Exam 6: Matters of Sex

Plumage in chickens is of two varieties,a "hen" pattern and a "cock" pattern.They differ because the trait is sex-limited - that is,males have different feather arrangements than females.The autosomal gene H controls the trait in this manner: HH hen pattern in both sexes Hh hen pattern in both sexes hh hen pattern in females and cock pattern in males Henrietta is one of a flock of hens who has chicks with Boris,the lone rooster.He has tantalizingly beautiful plumage in the cock pattern.If Henrietta is genotype Hh,the probability that a male chick will have his father's gorgeous plumage is

A carrier of an X-linked recessive trait who experiences the phenotype is called a

In an XY embryo,production of anti-Mullerian hormone inhibits development of

The idea that femaleness is simply what happens when an embryo does not develop as a male is no longer supported by evidence because of the discovery of

In males,genes on the X chromosome are

Human males are the _______ sex.

The male-specific region of the Y chromosome

The Y chromosome was challenging to sequence because

In genomic imprinting,the expression of a genetic disorder depends on

X inactivation is controlled by

A male with a missing SRY gene would be phenotypically a

Unspecialized structures in embryos that develop into female sex organs are the

Eight-year-old Rhapsody has just learned that her younger brother Clyde is colorblind.Although she knows she has color vision because her cat Juice is clearly orange,and she reads that nearly all people with colorblindness are boys,she is concerned about her own sons one day.If she is a carrier for colorblindness,then the risk that a son of hers is colorblind is

Sean has congenital generalized hypertrichosis,an X-linked dominant condition that produces dense hair on the face and upper body.He can pass this trait

A boy developed signs of sexual maturity at age 3.A possible diagnosis is

X-linked genes have different patterns of expression in females and males because

In female mammals,

A gene on the Y chromosome that determines maleness is

An allele that is dominant in one sex but recessive in the other is

Renfrew is a male boa constrictor.He has two copies of a sex chromosome called a Z chromosome.Renfrew is a member of the __________ sex.