Overview of interacting Genes Video Lessons

Video Thumbnail

Concept

Problem: In a cross between a strain of large guinea pigs and a strain of small guinea pigs, the F1 are phenotypically uniform, with an average size about intermediate between that of the two parental strains. Among 1017 F2 individuals, 1 is about the same size as the small parental strain and 1 is about the same size as the large parental strain.How many gene pairs are involved in the inheritance of size in these strains of guinea pigs? A) five B) two C) four D) three

FREE Expert Solution

To calculate for the number of genes controlling a phenotype:

r=14n


where r = proportion of offspring exhibiting extreme phenotypes in F2

n = number of genes controlling the trait

View Complete Written Solution
Problem Details

In a cross between a strain of large guinea pigs and a strain of small guinea pigs, the F1 are phenotypically uniform, with an average size about intermediate between that of the two parental strains. Among 1017 F2 individuals, 1 is about the same size as the small parental strain and 1 is about the same size as the large parental strain.


How many gene pairs are involved in the inheritance of size in these strains of guinea pigs? 

A) five 

B) two 

C) four 

D) three

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Overview of interacting Genes concept. You can view video lessons to learn Overview of interacting Genes. Or if you need more Overview of interacting Genes practice, you can also practice Overview of interacting Genes practice problems.