Question

A eukaryotic diploid cell from an organism with the ZZ-ZW sex determination system has two pairs of autosomes and a pair of sex chromosomes, Z and W. What is the probability of a gamete from this individual that has the following genotype: alleles A and b, chromosome Z?

a) 1/2
b) 1/4
c) 1/8
d) 1

Answer 1

The probability of a gamete from an individual with the ZZ-ZW sex determination system having the genotype alleles A and b on chromosome Z is 1/2.

Correct answer is a. 1/2.

Step-by-step explanation:

The probability of a gamete from an individual with the ZZ-ZW sex determination system having the genotype alleles A and b on chromosome Z can be calculated by looking at the arrangement of chromosomes during meiosis. In this case, the individual has two pairs of autosomes and one pair of sex chromosomes, Z and W.

During meiosis, the chromosomes undergo a process called crossing over, where genetic material from homologous chromosomes is exchanged. This means that the alleles A and b can be found on both sister chromatids of chromosome Z.

Therefore, the probability of a gamete from this individual having the genotype alleles A and b on chromosome Z is 1/2.so the correct answer is a. 1/2.