Unit 6 Test Retake: The Human Genome - 2nd Period

Front

Who do males get their X chromosome from?

Back

Males get their X chromosome from their mother.

Front

What happens when spindle fibers are prevented from forming?

Back

Mitotic division stops in metaphase and cannot proceed to anaphase.

Front

What is androgenetic alopecia?

Back

Androgenetic alopecia is a common form of hair loss in both men and women, caused by an X-linked recessive trait.

Front

What is the probability that a son of a father without androgenetic alopecia and a mother with it will have the condition?

Back

100%.

Front

What must the genotype of individuals in a pedigree showing a recessive disorder be?

Back

Hh (heterozygous).

Front

What is the most likely genotype for a person in a pedigree tracing a recessive trait who is a carrier?

Back

Gg (heterozygous).

Front

Define X-linked recessive trait.

Back

A trait associated with a gene located on the X chromosome, where males are more likely to express the trait.

Front

What is the significance of the G₀ phase in the cell cycle?

Back

G₀ phase is a resting state where cells are not actively dividing.

Front

Explain the role of spindle fibers during mitosis.

Back

Spindle fibers help separate chromosomes during cell division.

Front

What does it mean if a trait skips a generation in a pedigree?

Back

It suggests that individuals can be carriers of a recessive trait without expressing it.