Genetics and Pedigrees

A dominant allele is represented by

• a lower case letter.

• a capital letter.

• an X.

• a Y.

A genotype is

• the physical appearance of an organism.

• a made up word for genes.

• not even a word.

• two alleles that an organism possesses.

A chicken is black, white, or black and white. This is controlled by

• Mendelian inheritance.

• incomplete dominance.

• codominance.

• sex-linked inheritance.

Colorblindness is more common in males because it is controlled by

• Mendelian inheritance.

• Incomplete dominance.

• codominance.

• Sex-linked inheritance.

This pedigree shows a trait that is most likely

• autosomal dominant.

• sex-linked.

• autosomal recessive.

The mom in generation 1

• has the disorder.

• is homozygous for the trait.

• is a carrier.

This is an autosomal recessive disorder. The parents in generation one must

• have the disease.

• be homozygous.

• be heterozygous.

• be related.

Which combination of sex chromosomes results in a male?

• XX

• YY

• XY

A chart that tracks a disorder in a family is called a

• pedigree.

• Punnett Square.

This is a __ trait.

• autosomal recessive.

• sex-linked.

• autosomal dominant.