What are the genotypes of the offspring

Reference no: EM133199313

Genetic questions

In snails, Gene S controls body size. The alleles for gene S are s+ (wildtype) and s- (an amorph). The wild-type phenotype is a fat body and the mutant phenotype is a thin body.

A second gene, Gene C, controls shell color. The alleles for gene C are c+ (wildtype) and c- (an hypomorph). The wild-type phenotype is a brown shell and the mutant phenotype is a white shell

Gene S and Gene C are linked but the cM between them is unknown

Question 2.

You cross a double homozygous wildtype snail to a double homozygous mutant snail. What are the genotypes, phenotypes and frequencies of the offspring of this cross?

QUESTION 3.

You cross the offspring from question 2 to a double homozygous mutant snail. What are the genotypes of the offspring?

QUESTION 4.

You count the offspring from the test cross from question 3 and get the following numbers:

20 thin body and brown shell

173 fat body and brown shell

21 fat body and white shell

177 thin body and white shell

QUESTION 5.

What is the genetic distance between Gene S and Gene C ?

Reference no: EM133199313

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