Question

why is this the answer ?

Complete Genes S and V are 21 m.u. apart. The parental generation consists of SS W and ss vw genolypes If an F1 male is mated with an F1 female, what proportion of their offspring are expected to have the genotype Ss W? 0.334 0.312 e 0022 0.167 0.25 Previous Answers Subin Correct

Answer 1

Answer: a). 0.334

Explanation:

SV/SV x sv/sv ---Parents

SV/sv--------------F1

SV/sv (F1) x SV/sv (F1) ----Z!

Distance between genes (m.u.) = Recombinantion frequency (%)

SV/sv parent produces 4 types of gametes as below:

Recombinant gametes (21%):

Sv = 10.5% or 0.105

sV = 10.5% or 0.105

Non-recombinant gametes (79%):

SV =39.5% or 0.395

sv =39.5% or 0.395

	(SV) 0.395	(Sv) 0.105	(sV) 0.105	(sv) 0.395
(SV) 0.395	0.156025	0.041475	0.041475	0.156025
(Sv) 0.105	0.041475	0.011025	0.011025	0.041475
(sV) 0.105	0.041475	0.011025	0.011025	0.041475
(sv) 0.395	0.156025	0.041475	0.041475	0.156025

SV/sv = 0.156025 + 0.011025+ 0.011025+ 0.156025 = 0.3341