Gene Interactions

Question 1

What does sex-linked refer to?

Answer 1

The genes which are carried on the sex chromosomes (X or Y).

Question 2

What does sex-influence refer to?

Answer 2

The phenotype depends on the gender of the animal even though the gene controlling the characteristics is not on the sex chromosome, they are instead influenced by sex hormones.

Question 3

What are Lethal Alleles?

Answer 3

Homozygous Alleles that cause an animal if they have them, it arises when a mutation to a normal allele disrupts the function of an essential gene (which causes the death of the animal).

Question 4

Are Lethal Alleles dominant or recessive?

Answer 4

This is a trick question, Lethal Alleles can be either dominant or recessive.

Question 5

What are multiple Alleles?

Answer 5

This is where three or more alternative Alleles of a single gene is possible.

Question 6

What are Epistatic effects?

Answer 6

When one gene affects the expression of another gene or the phenotype.