Punnett squares review

Match the following combinations of alleles:

• DD

• Homozygous recessive

• dd

• Homozygous dominant

• Dd

• Heterozygous

Two parents are both heterozygous. They both have brown eyes. What are the chances their child will also have brown eyes?

• 25%

• 75%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?

• 75%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS4-3

What is it called when both alleles in a genotype are the same?

• Dominance

• Heterozygous

• Homozygous

• Recessiveness

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the mother's genotype?

• DD

• Dd

• dd

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How chance the offspring born from this cross will have a homozygous dominant genotype?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS4-3

Johnny eats food that still had pesticides residue on it. In his late 60s he is diagnosed with cancer due to the pesticides in his body. What was this mutation caused by?

• Chemicals

• Environment

• Errors in meiosis 1

• Errors in mitosis

Tags

NGSS.HS-LS3-2

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2