Question

An individual who is heterozygous for two linked genes has the genotype AB/ab, which means that the A and B alleles are in one chromosome and the a and b alleles are in the homologous chromosome. Among the products of meiosis listed, which would be the recombinant types?
Select all that apply.
a. a Bb. a bc. A Bd. A b

Answer 1

Answer:

a and d

Explanation:

Among the products of meiosis listed, aB and Ab would be the recombinant types because recombinant gametes are gametes that are unique from the haploid gametes that made up the diploid cell.

A and B alleles are on a particular chromosome while a and b alleles are on another chromosome. During the process of gamete formation/meiosis, the possible gametes are;

• AB
• ab
• Ab
• aB

While the first two gametes are parental (because they made up the original diploid cell), the last two gametes are recombinant gametes.

Hence, from the list of options, aB and Ab are the only recombinant types.

The correct options are a and d.

Answer 2

Answer:

b. a b,

c. A B

Explanation:

Recombination can be explained or known to occur when two molecules of DNA exchange pieces of their genetic material with each other.

It is known that the notable examples of recombination takes place during meiosis, exactly during prophase I, when homologous chromosomes line up in pairs and swap segments of DNA.

This process of recombination is known in genetics as the mechanism through which variation is introduced into populations. This is because it involves the exchange of genetic material between different organisms, resulting to the production of offspring with different combinations of traits to that of the parents.

In this case, the recombinant types are " a b, and A B".

It should be understood that recombinants are the genetic material produced when segments of DNA from different sources are joined to produce recombinant DNA.