If Efes locus has E(dominant) and e(recessive) and Falafel Locus (with alleles F

Question

If Efes locus has E(dominant) and e(recessive) and Falafel Locus (with alleles F (dominant) and f(recessive)) are 9.0 map units apart. If an EeFf individual(non reombinant gametes Ef/eF) is mated with an ef/ef individua which of the following statements are true

A. 4.5% of the offspring will show both recessive phenotypes

B. 45% of the offspring will show the recessive phenotype at Efes and the dominant phenotype at Falafel locus

C. 91% of offspring will show the dominant phenotype at the Efes locus and recessive at Falafel locus

D. 9% of offspring will show both recessive pheno types.

I believe the answer is A with the below explanation. Can some one help me validate

Ef ---> Ef (Parent) or EF (Recombinant gamate)

Fe ---> Fe (Parent) or fe (Recombinant gamate) <-- I reveresed eF given to Fe to make it trans (I assume it cannot be CIS when there is repulsion)

The other parent is always ef

Hence, only recombinant gamate fe can result in both recessive phenotype with feef. Since map distance is 9% and 2 recombinants are FE and fe which are assumed as half each. Hence 4.5%.

Please validate

Explanation / Answer

Hi,

I think your answer is correct. Option A 4.5% is the correct one.

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