Question

In a hybrid cross between two individuals with the following genotypes:

Parent 1: A/A, b/b, D/D, e/e, F/F Parent 2: a/a, B/B, d/d, E/E, F/F

the five genes are sorted independently, excpet for D and E, which are tightly linked and show zero recombination. What fraction of the progeny following a selfing of the F1 hybrid would NOT resemble the parents PHENOTYPICALLY ?

Answer 1

for both parents5 genes are assorted independently however gene D and E are tightly linked but no recombination occures. hence D and E too assort independently. as it follows typical mendelian pattern. the resultant progent is 9:3:3:3:3:3:1. out of 25 possible progenies 9 may resemble with their parent hence, 16 may not resembles as their parents.see the table, the bold latters are progeny may resemble with parents.

Genes	aa	BB	dd	EE	FF
AA	AAaa	AABB	AAdd	AAEE	AAFF
bb	bbaa	bbAA	bbdd	bbEE	bbFF
DD	DDaa	DDDBB	ddDD	DDEE	DDFF
ee	eeaa	eeBB	eedd	eeEE	eeFF
FF	FFaa	FFBB	FFdd	FFEE	FFFF