Monohybrid Practice

Brown hair is dominant over light hair. If a homozygous parent (Aa) is crossed with a heterozygous recessive parent (aa), their children will have...

• Only Brown Hair

• Only Light Hair

• Some brown and some light

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a homozygous dominant allele (AA) is crossed with a homozygous recessive allele (aa), all of the resulting offspring will be

• Homozygous dominant

• Heterozygous

• Homozygous Recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In guinnea pigs, black eyes are dominant to red eyes. A male guinnea pig that is heterozygous is crossed with a female that is homozygous recessive. What are the expected phenotypes of their offspring?

• Red Eyed and Black Eyed

• Only Red Eyed

• Only Black Eyed

Tags

NGSS.HS-LS3-1

A Tall plant (T) is dominant to short plant (t). If all offspring of a cross are heterozygous (Tt), what were the genotypes of the parents?

• TT + tt

• Tt + Tt

• tt + tt

• TT + TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plants purple flowers are dominant to white flowers. What parental genotypes would produce offspring that are all homozygous for the purple trait?

• TT + tt

• TT + TT

• tt + tt

• Tt + Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired what are the possible genotypes of the parents? (There are two possible combinations.)

• Ss + Ss

• SS + SS

• SS + Ss

• ss + ss

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2