Lecture 5 - Mendel's Second Law

Question 1

What is Mendel’s Law of Independent Assortment?

Answer 1

during gamete formation, alleles at separate loci segregate independently and this produces characteristics genotypic and phenotypic ratios

Question 2

what is the ratio of a dihybrid cross between 2 “double heterozygotes”?

Answer 2

1:2:1:2:4:2:1:2:1 genotype
9:3:3:1 phenotype

Question 3

The further away the alleles are located, the less likely they are to independently assort?

Answer 3

False

Question 4

When does Mendel’s second law not hold true?

Answer 4

May not hold if the loci are physically adjacent or linked on the chromosome. Therefore, Mendel’s ratios only apply to non-linked genes/alleles