Genetics

Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?

• genetics

• heredity

• genotype

• phenotype

Heterozygous is when...

• the alleles are the same.

• the alleles are different.

• the alleles are absent.

• the alleles are present.

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

The genotypes AA and Aa always show up as the __________ phenotype.

• dominant

• recessive

If a black guinea pig (BB) and a white guinea pig (bb) mate, there is a ______ chance that a white guinea pig will be born.

• 0%

• 25%

• 50%

• 75%

• 100%

A dominant allele is represented by a ______ letter.

• lower-case

• capital

In animals, shaggy fur is dominant to short fur. According to the genotypes shown, what percent of offspring will have short fur?

• 0

• 25

• 50

• 75

• 100

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

In animals, shaggy fur is dominant to short fur. The Punnett Square shows the genotypes of the offspring of a shaggy fur animal and a short fur animal. What were the genotypes of the parents?

• FF and FF

• Ff and ff

• ff and ff

• Ff and Ff

Blue-eyed is a ______.

• genotype

• phenotype