How would the human population be different if crossing over did not happen during meisosis?

Answers

Answer 1
If crossing over did not occur during meiosis, there would be less genetic variation within a species. With crossing over, potentially every chromosome could consist of a combination of both maternal and paternal alleles, which, along with random segregation of chromosomes during anaphase II, would result in a nearly limitless number of genetic variations between related individuals and within a species.

Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations, which would greatly reduce the amount of genetic variation between related individuals and within a species.
And as genetic variation decreases, the species has a very less chance to evolve and adapt as natural selection.

Related Questions

The English system issues as the international system of measurement true or false

Answers

Answer:false

Explanation:

to occur where faults are 1) Earthquakes are located. 3- less likely more likely

Answers

Answer & Explanation:

Earthquakes can strike at any location on Earth and at any point of time. However, some parts of the Earth are more prone to earthquakes than others. Earthquakes happen along the edges of tectonic plates and fault lines and there are three large zones on our planet which are most susceptible to earthquakes.:-)

Intracellular transport, changes in cell shape, cell motility and animal locomotion depend on the microtubules, microfilaments, motor proteins and their accessory proteins. You should be able to explain how each of these four movement functionsabove are achieved by microtubules and microfilaments. Make sure you understand the role of the different motor proteins involved that are specific to microtubule movement vs. microfilament movement. Microtubules and microfilaments also have important roles in the cytoskeleton.

Answers

Answer:

Intracellular transport is taking place with the help of microfilaments and microtubules. The plays the role of a highway for motor proteins such as dynein, kinesin, and myosin, which acts as the car of this highway that helps in transport.

Motor proteins help in changing the ATP to ADP by binding to it and attach or detach to the other parts of the cytoskeleton for transporting the vesicles as these proteins move.

Kinesin and dynein both are microtubule motor proteins. Kinesin transports full vesicles away from the nucleus, Dynein transports empty vesicles back towards the nucleus and myosin is a microfilament motor protein that transports both vesicles along microfilament.

13.
Which is not a product of photosynthesis?

water
oxygen
glucose
nitrogen

Answers

Answer:

nitrogen

Explanation:

Plants use photosynthesis by taking in water and carbon dioxide and releasing oxygen while consuming food (glucose) for itself. Therefore, your answer is nitrogen. No nitrogen is created during this process

Answer:

Nitrogen

Explanation:

Photosynthesis is a process used by autotrophs and producers, like plants, algae, and some bacteria. In this process, water, carbon dioxide and light energy from the sun are turned into glucose and oxygen. The glucose becomes food for the organism, and the oxygen becomes the waste product.

There is no nitrogen involved in photosynthesis. It is not created, and therefore is not a product. The best answer choice is nitrogen

I am a dragon ball fan, but I NEED HELP ON BIOLOGY!!!! Look at attachment! Please help! Thanks! :)))

Answers

Answer:

DNA replication

Explanation:

DNA replication is where the cell takes a piece of DNA and replicates it(self-explanatory)

DNA replication  -hope this helped

Miles wants to write the equation for photosynthesis. The diagram below represents one of the molecules in the equation,
H
H-C-0-H
C-
0
H-O
0-H
H
0-H
H
0-H
Which chemical formula reflects the diagram?
6012H6C
6C12H60
Mark this and turn
Save and Exit
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Submit

Answers

Answer:

The options to this question are incomplete, the complete options are:

A) 6O12H6C

B) 6C12H6O

C) O6H12C6

D) C6H12O6

The correct answer is D) C6H12O6

Explanation:

According to the question, Miles is trying to write down the chemical equation for Photosynthesis. Photosynthesis is a chemical reaction that cells of autotrophic organisms undergo in the presence of sunlight to produce their food. Photosynthesis, which occurs in the Chloroplast, involves the chemical reaction between Carbondioxide (CO2) and water (H2O) to produce a sugar called glucose (C6H12O6) and oxygen gas (O2).

The food is synthesized as glucose, which is a monosaccharide (simple carbohydrate) that cells absorb in order to synthesize energy (ATP).

The overall equation of photosynthesis is as follows:

C02 + H2O ---light---> C6H12O6 + 6O2

The diagram in the question, although incomplete, depicts the sugar (glucose) component of the equation. The correct chemical formula for this sugar is written as: C6H12O6

What is the potential problem for robotic rovers on Mars?

Answers

Answer:

The limited  autonomy of the robotic rovers on Mars posed a big problem.

Explanation:

Missions are very costly, and can lead the project to fail with the simplest errors. If the rover was permanently trapped on a rock or destroyed, it would have a catastrophic impact on the exploration. Thus on-board technologies would still be more traditional than what a laboratory environment has sought. The autonomous rovers will considerably increase the productivity of  crew. Responsibility for their own well-being is also useful for the rovers: to prevent getting hurt, to recognize and correct recoverable hardware and software faults.

What are long term effects of global warming?

Answers

Answer:

Extreme warm weather, glacial melting, rising sea levels, Ocean Acidification,Animal Migration and Extinction of Species, The Increase of Health Issues and Costs.

Long term effects of global warming is glaciers melting , rising sea levels , extreme hot weather , etc. hope this helps you a little bit.

4. What do complement proteins do?
O They heal tissue.
They transport hormones.
O They cause fever.
O They signal phagocytes.

Answers

Answer:

They signal phagocytes.

Explanation:

hope this helps

In what part of the day do plants produce more carbon dioxide and oxygen

Answers

Answer:

During the day in the light reactions of photosynthesis

Explanation:

During the day, as there isn’t light for it to take in at night

Se efectúa un experimento en el que a la planta 1 se le suministra CO2 normal pero agua que contiene átomos de oxígeno radiactivos. A la planta 2 se le suministra agua normal pero CO2 que contiene átomos radiactivos de oxígeno. Se permite que ambas plantas efectúen fotosíntesis y se mide la radiactividad del oxígeno gaseoso y los azúcares producidos. Qué planta esperarías que produzca azúcares radiactivos y cuál oxígeno radiactivo, por qué?

Answers

Answer:

The Oxygen liberated in photosynthesis comes from photolysis of water.

The CHO formed from Calvin Cycle during photosynthesis comes from reduction of CO2 with H+ of photolysis of water.

Therefore,since Plant 1 contains labeled Oxygen(from water) it will give radioactive Oxygen as the byproduct of its photosynthesis. It CHO is normal.

However,Plant 2, will contain radioactive CHO,because its radioactive CO2 will be reduced by H+  from photolysis of water to form radioactive labeled  carbohydrate(CHO)

Explanation:

Cactus spines are modified
· branches
· leaves
· stems

Answers

Answer:

Leaves

Explanation:

The spines of a cactus help prevent water loss by reducing air flow close to the cactus and providing some shade, while also deterring most animals that would make a meal of the cactus.

Select all that apply. Plant organs include: ° chloroplasts ° roots ° mitochondria ° stems ° leaves

Answers

Answer:

leaves,stems,roots

Explanation:

Answer: leaves stems roots

Explanation:

Which of these statements did Louis Pasteur confirm with his broth
experiments?
A. The theory of spontaneous generation is false.
B. All living organisms consist of units called cells.
O C. The cell theory needed to be changed.
OD. New cells can be formed by spontaneous generation.

Answers

awnser is d hope this helps

The Eocene period exists in Earth’s history around 34 MYA. What could a scientist do to determine what era the Eocene period belongs to on the geologic time scale?

Answers

Answer:

To understand what era the Eocene period belongs to on the geologic time scale, the scientist would have to examine the Cenozoic era to understand all information related to it.

Explanation:

First, let's start with an explanation of terms.

MYA simply means Millions of Years Ago Time Scale is a sequence or organisation of events which is used as a yardstick to measure the duration of history or how long the earth has existed. Eocene Period refers to the geological epoch that lasted from about fifty-six to approximately forty MYA. It is also defined as the second epoch of the Paleogene Period within the modern Cenozoic Era.  

Given the definition of the Eocene Period, to understand what era an Eocene period belongs to, the person must carefully study the Cenozoic era.

Cheers!

Answer:

b

Explanation:

O
e
65°what is meant by the term photosynthesis ​

Answers

Photosynthesis can be defined as the process by which green plants manufacture their food. Photosynthesis is important not only to plants themselves but also to animals, which depend on plants for food.

A group of students are designing a model house that is safe in strong winds.Which house would be the safest?
a- A house built out of plastic straws.
b- A house built out of toothpicks.
c- A house built out of linking cubes.
d- A house built out of craft sticks.

Answers

Answer:linking cubes because they would be together

Explanation:

help asap please!?
1.In binomial nomenclature of organisms, every species name includes two words. The first word is the name of the _______.
2.A monophyletic group or clade consists of a single _______ and all of its descendants.

3.Cladograms sometimes indicate _______, or shared characteristics. All species have that characteristic from the indicated point forward.


4.What's our system of naming organisms called, and what are the two most specific categories of organization?

5.If a scientist is studying the evolutionary relationship between two species of birds, what tool could she use to help her chart their relationship?

6.How is one clade differentiated from another clade?

7.Which type of character provides useful data for cladistic analysis?

8.What technological development allowed for a more detailed understanding of the relationship between species?

Answers

Answer:

1) genus

2) organism

3) clade

4) the system of naming organism is called binominal nomenclature while the two most specific categories of organization is genus and species the genus is the first and species is the second

5) the tool used to help her chat their relationship is a phylogeny

6) A clade is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor. Using a phylogeny, it is easy to tell if a group of lineages forms a clade.

Explanation:

Answer:

1. Genus

2. Common ancestor

3. Synapomorphies

4. The system is called binomial nomenclature, and the specific categories used are genus and species.

5. The scientist could use a phylogenetic tree to help visualize the evolutionary relationship.

6. One clade is differentiated from another clade by a branching point within the phylogenetic tree that's defined by some character or characters.

7. Since cladistics depict an evolutionary relationship between organisms, the traits that are studied and categorized are homologous traits.

8. DNA sequencing is the technological development that allowed scientists to gain a more complete understanding of the relationships between species.

which choice describes the flow of energy in a food chain?

a. grass - rabbit - wolf - sun
b. wolf - sun- grass- rabbit
c. sun- grass-rabbit-wolf
d. rabbit - wolf -sun - grass

Answers

Answer:

C.

Explanation:

c. sun- grass-rabbit-wolf

Answer:

C

Explanation:

sun- grass-rabbit-wolf

Sun makes grass grow, rabbits eat grass, and finally wolves eat rabbits.

What were the Himalayan Mountains formed by?

The gravity of the Sun pulling on Earth's crust
Erosion over time
A meteor hitting Asia
The movement of Earth's crust

Answers

Answer: The movement of the Earth's crust

Explanation:

The movement of the earth's crust is responsible for the formation of the Himalayas. The Himalayas ranges and the Tibetan plateau is formed by the result of the collision between the Indian plate and the Eurasian plate which started 50 million years ago.

This leads to the movement of the earth's crust which aimed to the formation of the mountains.

The movement of the plates lead to the movement of the earth's crust which lead to the formation of Himalayan mountain.

How are viruswa different from bacteria ?
Answer: a .viruses are not alive .

Answers

Answer:

Viruses are tinier than bacteria. In fact, the largest virus is smaller than the smallest bacterium. All viruses have is a protein coat and a core of genetic material, either RNA or DNA. Unlike bacteria, viruses can't survive without a host.

So life itself is an emergent, complex state, but it is made from the same fundamental, physical building blocks that constitute a virus. Approached from this perspective, viruses, though not fully alive, may be thought of as being more than inert matter: they verge on life.

Explanation:

Decide if the following sentences are true or false. You have to correct the false ones.
a) There are four kinds of coal depending on their carbon content.
b) Coal is usually found in liquid state.
c) Fossil fuels are the result of the descomposition of plants and animals from the past.
d) Petroleum is the cheapest source of energy.

Answers

Answer:

b) is false      coal is usually found in solid state.

Explanation:

I think the answer is A

Given an isolated desert city with little wind and long dry days, throughout the year, what would you consider before recommending an alternative energy source? What alternative energy source would you recommend?Explain your answer.

Answers

Answer:

The little wind and long dry days throughout the year is a characteristic feature of Arid habitats. Definitely, there will be abundant sunlight, with rainfall. Consequently, the alternative source of energy is Solar energy.(photovoltaic) Wind energy would  have been used if the wind were strong and much, But with little wind, this is not an option.

Therefore ,confirming the use of solar  as source of energy

Explanation:

Which of the following blocks cell wall synthesis?'
augmentin
rifampin
erythromycin
ciprofloxacin
mebendazole

Answers

Answer:

im pretty sure the correct answer is ciprofloxacin

What types of enzymes play a catalytic role in the regulation pathway of ubiquitination?

Answers

Answer:

ubiquitin activating enzyme ( E1), a ubiquitin conjugating enzyme (E2), and a ubiquitin ligase (E3).

Explanation:

In ubiquitination, ubiquitin (regulatory protein) attach to a protein to inactivate it and targets a protein for degradation via the proteasome.

There are three enzymes sequentially catalyse the process of ubiquitination that includes ubiquitin activating enzyme ( E1), a ubiquitin conjugating enzyme (E2), and a ubiquitin ligase (E3).

The E1 activates ubiquitin by forming a thiol ester bond between the C terminus of ubiquitin and the active cysteine of the E1 which is an ATP dependent step.

The activated ubiquitin then tranferred to cysteine of E2 which along with E3 transfers the ubiquitin to a lysine residue in the target protein.

Hence, all three ubiquitin activating enzyme ( E1), a ubiquitin conjugating enzyme (E2), and a ubiquitin ligase (E3) enzymes sequentially catalyse the process of ubiquitination.

How does a hormone like ADH only know to have an effect on the cells of the kidney and nowhere else?

Answers

Answer:

Vasopressin or antidiuretic hormone (ADH) or arginine vasopressin (AVP) is a nonapeptide synthesized in the hypothalamus. Science has known it to play essential roles in the control of the body’s osmotic balance, blood pressure regulation, sodium homeostasis, and kidney functioning. Given its vital role in multiple functions, it is no surprise that ADH is of great clinical significance. ADH primarily affects the ability of the kidney to reabsorb water; when present, ADH induces expression of water transport proteins in the late distal tubule and collecting duct to increase water reabsorption. Several disease states arise when the body loses control of ADH secretion or responds to its presence.

Explanation:

The small intestine _____.
stores bile
releases bile into the small intestine
absorbs nutrients from digested food
absorbs extra water from undigested food



HELP!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

The small intestine absorbs nutrients from digested food.

Explanation:

EASY QUESTION! A box has a length of 2cm a width of 2 and a height of 2 cm. It has a mass of 4g. Find the density.

Answers

Answer:

1/2 g/cm³

Explanation:

density= mass/volume

density= 4 g/ 2*2*2 cm³ = 1/2 g/cm³

Which phrase best describes a scientist?

Answers

Explanation:

A process that includes the different ways that scientists find out about the natural world and try to explain what they have observed.

Answer:

:They are helpers of the world  who find out about the natural world and try to explain what they have observed.

Explanation:

Increase in tension by increasing the number of motor units that are stimulated is called _________. Increase in tension by increasing the number of motor units that are stimulated is called _________. muscle tone autorhythmicity hypertonia recruitment

Answers

Answer: Recruitment

Explanation:

A motor unit is made up of a motor neurone and all the muscle fibre it supplies nerve to.

Within a muscle, the muscle fibers are functionally organized as MOTOR UNITS within a muscle.

MOTOR RECRUITMENT causes an increase in muscle tension which occurs when there is an increased number of stimulated motor units.

During a muscle contraction, the weakest motor units are recruited to contract first,The more weight (resistance) you add to a muscle, the more motor units you will need to recruit in order to generate movement.Recruitment stops as soon as movement starts, result is a smooth, even muscle contraction. I hope this helps, thanks.

Other Questions
For each item listed below, indicate the effect on net income in arriving at cash flows from operations by choosing one of the following code letters. Code Cash Flows from Operating Activities Add to Net Income A Deduct from Net Income D 1. A decrease in accounts receivable 2. Increase in inventory 3. Increase in prepaid expenses 4. A decrease in accounts payable 5. Decrease in accrued liabilities 6. Increase in income taxes payable 7. Depreciation expense 8. Loss on sale of investment 9. Gain on disposal of equipment 10. Depletion expense2) Please complete the following:Net Income......................................................................................... $177,000Adjustments to reconcile net income to net cash provided by operating activities:Depreciation expense, $15,000........................................................ _______Increase in accounts receivable, $45,000........................................... _______Increase in inventory, $22,000......................................................... _______Decrease in accounts payable, $11,800............................................. _______Increase in income taxes payable, $1,500.......................................... _______Gain on sale of land, $5,000............................................................ _______Net cash provided (used) by operating activities.................................. _______ For calendar year 2018, Stuart and Pamela Gibson file a joint return reflecting AGI of $350,000. Their itemized deductions are as follows: Note: All expenses are before any applicable limitations, unless otherwise noted.Casualty loss in a Federally declared disaster area after $100 floor (not covered by insurance) $48,600Home mortgage interest (loan qualifies as acquisition indebtedness) 19,000Credit card interest 800Property taxes on home 16,300Charitable contributions 28,700State income tax 18,000Tax return preparation fees 1,200Round your intermediate computations to nearest whole dollar.The amount of itemized deductions the Gibsons may claim for the year is? two current carrying wires are placed next to each other. Their currents are moving in the same direction. Suggest why each wire experiences a force Solve 2y - 3 = 4y +6.Iy= Suppose the kicker launches the ball at 60 instead of 30. Assuming that the goal is 4.55 m high and 40 m away, what minimum initial speed v0 would the ball need to have in order to just clear the goal? Is 6.584 a rationalnumber? 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