Exam 48: Genetics and Heredity

Chromosome 1 contains the most number of genes, nearly:

Nondisjunction results in gametes that produce either trisomy or monosomy in the cells of offspring.

Cystic fibrosis, caused by recessive genes in chromosome pair 7, results in the impairment of the:

The term mutation simply means "change."

In the human, the 22 pairs of autosomes always appear to be nearly identical to each other.

Fetal tissue can be collected by amniocentesis, a procedure in which fetal cells floating in the amniotic fluid are collected with a syringe.

In a pedigree, a half-shaded circle indicates a:

People who inherit the gene for hemophilia have an increased risk factor for a blood clotting disease that will express itself in the correct environmental conditions.

Match each of the terms with its corresponding definition. -Presence of only one autosome of a pair

Match each condition with its corresponding statement or definition. -Disorder characterized by multiple tumors of the Schwann cells that surround nerve fibers

It may be that women of any age have an equal likelihood of nondisjunction, but in younger women, the fetuses would spontaneously abort.

People with xeroderma pigmentosum have a high risk of developing skin cancer.

For an individual to have Down syndrome, one of the gametes had to have contained 24 chromosomes.

You would expect the p-arm of a chromosome to carry more genes than the q-arm of the chromosome.

All of the following diseases demonstrate single-gene inheritance and are autosomal recessive except:

Homozygous refers to a trait that is determined by a single gene pair.

Genetic mutations are always harmful.

The beta chain in hemoglobin remains normal in a person with sickle cell anemia.

A Punnett square can be used to detect Down syndrome.

When one or more DNA nucleotides are missing in a gene, it can be called a(n):