4/26/24 - Lecture 14: Inheritance II: Other Patterns of Dominance and Linkage

Question 1

Law of segregation

Answer 1

When any individual produces gametes, the two copies of a gene separate so that each gamete receives only one copy

Question 2

Law of independent assortment

Answer 2

Alleles of different genes assort independently of one another during gamete formation

Question 3

Complete dominance

Answer 3

One allele completely masks the other phenotype

Question 4

Codominance

Answer 4

Both alleles are distinct in the phenotype

Question 4

Incomplete dominance

Answer 4

Phenotype of the heterozygote appears to “blend”

Question 5

Human blood type alleles

Answer 5

A is: completely dominant over O
B is completely dominant over O
A and B are codominant
O is recessive and phenotype only shows when you get both alleles

Question 6

Crossing over

Answer 6

Where genes at different loci on the same chromosome recombine and separate

Question 7

How does physical location affect chances of recombination?

Answer 7

The closer the genes are on a chromosome, the less likely recombination is. Conversely, the farther they are apart, the more likely they are to cross over

Question 8

Between two sets of genes, which pair is located closer to one another on a chromosome?

Answer 8

The two genes with the lower recombination rate are closer to one another

Question 9

Map unit

Answer 9

1 map unit = 1% recombination rate