1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NeTakaya
3 years ago
5

Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The steps of meiosis are shown

. Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?
Biology
1 answer:
BARSIC [14]3 years ago
4 0

Answer:

Crossing-over

Explanation:

Meiosis is a kind of cell division that occurs only in sexually-reproducing organisms. It is the process by which they produce gametes. Meiosis is that division in which the number of chromosomes in the resulting cells are reduced by half. Due to this reason, meiosis occurs in a two step division process viz: Meiosis I and II.

Meiosis produces genetically different reproductive cells. This is as a result of a phenomenon unique to only meiosis called CROSSING-OVER. Crossing-over is a process whereby non-sister chromatids of homologous chromosomes exchange a segment of their genetic material. It occurs only in Prophase 1 of meiosis where the TETRAD structure is formed. This exchange of genetic material causes a recombination of DNA in the resulting cell (gamete).

Crossing-over only occurs between non-sister chromatids of homologous chromosomes, hence, it can only occur in Prophase 1. Prophase II involves sister chromatids.

You might be interested in
Which of the following statements about speciation is true? Which of the following statements about speciation is true? Speciati
NARA [144]

The answer is Speciation cannot occur in the absence of mutation. Speciation cannot occur in the absence of natural selection

3 0
2 years ago
Jared is a vegan (total vegetarian). he can increase his intestinal tract's ability to absorb iron in his diet by combining iron
Elden [556K]
The combination of citrus food in the diet may help Jared in creasing the absorption of iron by his intestine. The fruits and vegetables rich in Vitamin C and the Ascorbic acid such as lemon, oranges etc., may be used. Further, beta-carotene rich sources like carrots, apricots, beans, spinach also will also help him.
4 0
3 years ago
quizlet i]n the heart, valves are located in the heart, valves are located just between the ventricles and the arteries. just be
ser-zykov [4K]

In the heart, the valves are located between atria and ventricles and between ventricles and arteries (option D).

<h3>What are valves in the heart?</h3>

Valves are membranous partitions which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction.

Valves in the heart enforce a one-way blood flow through the heart and separate atria from ventricles, and ventricles from the large arteries that leave them.

The four valves in the heart and their location is as follows:

  1. tricuspid valve: located between the right atrium and the right ventricle
  2. pulmonary valve: located between the right ventricle and the pulmonary artery
  3. mitral valve: located between the left atrium and the left ventricle
  4. aortic valve: located between the left ventricle and the aorta.

The valves between the atria and ventricles are called atrioventricular valves or cuspid valves while those at the bases of the large vessels leaving the ventricles are called semilunar valves.

Therefore, it can be said that the valves of the heart are located between atria and ventricles and between ventricles and arteries.

Learn more about valves of the heart at: brainly.com/question/28266922

#SPJ1

5 0
1 year ago
Name_________________________________ Date_________ Per.____
pantera1 [17]

Answer:

IGUANA LIKE

Explanation:

3 0
3 years ago
In a maternity ward, four babies become accidentally mixed up. The ABO blood types of the four babies are known to be. Baby Jane
nydimaria [60]

Answer:

See explanation

Explanation:

We inherit our blood groups from both parents. Our blood type is controlled by a single gene. This gene displays 3 different allelic pairs which must include A, B or O.  A child is expected to receive one of the three possible allelic pairs from each of the both parents. This means that there are six possible genotype and four possible phenotype for the child.

Given that Christopher's parents (Andersons) are AB and O,Christopher can have a B blood group.

Given that John's parents (Browns) are A and O, it explains how John can have blood group A.

Given that The Christiansons are A and AB, they can give birth to Robin whose blood group is AB.

Since the Dietrichs are O and O, the only possible blood group of their child is O, hence they are definitely the parents of Jane.

7 0
3 years ago
Other questions:
  • _____ is a medical intervention that goes through rigorous testing and evaluation of its benefits through randomized clinical tr
    15·1 answer
  • 3. chemical compound plants make out of sugars into fibers for structure<br> and support
    9·1 answer
  • Conduction of nerve impulse​
    9·1 answer
  • What kind of cross might tell you if a guinea pig is BB or Bb? Why?
    12·1 answer
  • Spores do not stain easily. perhaps you have seen them as unstained white objects inside bacillus species in other staining proc
    14·1 answer
  • Why are iron meteorites the core of asteroids?
    6·1 answer
  • Which of these activities requires the use of a material resource?
    10·1 answer
  • 2. What social issues affected the problem or its solution in each of the stories?
    13·1 answer
  • Passive transport moves molecules_____their concentration gradient (its not move)
    9·1 answer
  • The nervous system is responsible for (1 point)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!