Exam 12: Chromosomes and Human Inheritance

A woman heterozygous for color blindness (an X-linked recessive allele) marries a man with normal color vision.What is the probability that their first child will be color blind?

Amniocentesis involves sampling

Males that tend to be taller than average and show mild mental impairment may be designated

Red-green color blindness is an X-linked recessive trait in humans.What is the probability that a color-blind woman and a man with normal vision will have a color-blind daughter?

Which statement is false regarding schizophrenia?

Which of the following individuals would be considered a carrier of a sex-linked recessive defect?

Duchenne muscular dystrophy

Which of the following statements is false about neurobiological disorders (NBDs)?

Genes are

Which of the following is different from the other four?

If a daughter expresses an X-linked recessive gene, she inherited the trait from

A karyotype

Which statement about primate chromosomes is false?

Down syndrome involves trisomy

Cri-du-chat syndrome results from a(n)

The Punnett square illustration below shows that theoretically

Nondisjunction involving the X chromosomes may occur during oogenesis and produce two kinds of eggs.If normal sperm fertilize these two types, which of the following pairs of genotypes are possible?

Which of the following is NOT true?

A genetic abnormality that may result in sterile males with some mental impairment or breast enlargement is

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in