Final Exam New Content Set 4

Question 1

genetics of simple dominant traits

Answer 1

To express the trait, you only need one dominant allele.

Question 2

genetics of simple recessive traits

Answer 2

Identical alleles for the trait require both recessive ones for expression.

Question 3

genetics of gender determination

Answer 3

X and Y chromosomes determine sex: females inherit two X chromosomes, males one X from their mother and one Y from their father

Question 4

genetics of sex-linked traits

Answer 4

Sex-linked traits are inherited through sex chromosomes, with males more prone to be affected, while females can carry them. Males express these traits with a single X chromosome carrying the gene.

Question 5

genetics of two-factor matings (dihybrid crosses)

Answer 5

parents with different alleles breed. One parent has two dominant alleles, while the other has two recessive alleles. The F1 offspring are all heterozygous.