Question

1)What is the ratio of phenotypes in offspring when one crosses two-hybrid individuals?

2) Due to __________________________, genes on an offspring’s chromosome will be a bit different than the same chromosome donated by the father

Answer 1

1. 3 : 1

Aa × Aa

Gametes	A	a
A	AA	Aa
a	Aa	a

Phenotypic ratio = 3 (AA, Aa, Aa) : 1 (aa)

2. Crossing over

Crossing over is the process of exchange of genetic material between non sister chromatids of homologous chromosomes. It results in the formation of Recombinant chromosomes which are slightly different from the parental chromosomes.

Please rate high.