Question

The NEXT 2 QUESTIONS refer to this oocyte cell in G1 phase (chromosomes depicted condensed for simplicity). Gene loci of 2 genes (gene A and gene B) are shown with black bars on the chromosomes. Each of these genes has 2 alleles: allele 1 designated as the capital letter, and allele 2 designated as the lower case letter of the respective gene.

Answer 1

Answer:-

4) if Genetic recombination results from independent assortment only (without crossing over )

Then genetically distinct gametes produced by given individuals are

1) AB and 2) ab

correct option is b) two

5) If Genetic recombination results from independent assortment and crossing over

Then gentic distinct gametes produced by given individuals are:-

1)AB 2)ab 3)Ab 4)aB

Correct option is :- c) four

Independent assortment :- occurs in anaphase I

Homologous chromosomes are randomly distributed during anaphase I separating and segregating chromosomes independent of each other.

Crossing over :- occurs in prophase I

It involves exchange of genetic material between non sister chromatids of homologous chromosomes.