Human Genetics

If a characteristic is sex-linked, the gene for it is found on

• a sex chromosome

• an autosome

• a linked chromosome

• an allele

Since the allele for colorblindness is located on the X chromosome, colorblindness

• cannot be inherited

• occurs only in adults

• is sex-linked

• occurs only in females

A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a

• Punnett Square

• monohybrid cross

• pedigree

• family karyotype

In humans, eye color and height are controlled by

• simple dominance

• multiple alleles

• polygenic inheritance

• incomplete dominance

Which of the following traits is controlled by multiple alleles in humans?

• eye color

• blood type

• colorblindness

• albinism

What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?

• type A

• type B

• type AB

• type O

Genes that are close together on a single chromosome are considered to be

• alleles

• homozygous

• independent

• linked

A _________ is caused by any change in a DNA sequence

• deletion

• duplication

• inversion

• mutation

If nondisjunction occurs,

• there will be too many gametes produced

• no gametes will be produced

• a gamete will receive too many or too few copies of a chromosome

• mitosis cannot take place

Trisonomy is a mutation that results in a cell having an extra

• nitrogen base

• codon

• chromosome

• gene