Pedigrees and genotypes

Dominant alleles are represented by a ---

• capital letter.

• lowercase letter.

Aa, DD, Bb, yy are all examples of ---

• genotypes.

• phenotypes.

In a heterozygous genotype (where there is one dominant and one recessive allele such as Aa), the _____ allele takes over in the phenotype.

• recessive

• dominant

• both

What you see, or the physical appearance of an organism, is called the ---

• genotype.

• phenotype.

On a pedigree, this symbol represents a ---

• not affected female.

• not affected male.

• affected male.

• affected female.

What is the genotype for individual #1?

• aa

• AA

• Aa

What is the genotype for individual #4?

• aa

• AA

• Aa

What is the genotype for individual #7?

• AA

• Aa

• aa

How are #5 and #7 related?

• cousins

• married

• siblings

• uncle/nephew

Which genotype must you have in order to be considered a carrier?

• Homozygous dominant (such as AA)

• Homozygous recessive (such as aa)

• Heterozygous (such as Aa)