Monohybrids 2

In pea plants, tall (T) is dominant over short (t).  Suppose a tall plant is crossed with a short pea plant, and 400 seeds are produced and planted.  If 196 plants are short, what were the likely parental genotypes?

• TT x TT
• Tt x Tt
• Tt x tt
• tt x tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In one species of tiger lilies, orange stripes are dominant to yellow stripes. What is the expected genotypic ratio in the offspring of two heterozygous orange-striped tiger lilies?

• 1:2:1

• 1:1

• 2:2

• 3:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cystic fibrosis is a recessive genetic disorder. A man and a woman are both carriers for cystic fibrosis. What is the probability they will have a child that also carries the cystic fibrosis allele?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In domestic swine there is a dominant allele that produces a white belt around the body. Suppose a heterozygous belted pig and solid pig mate.  What is the probability they will produce a solid pig?

• 0%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Donkey and the fire-breathing dragon (from Shrek movies) have lots of babies. If breathing fire is a recessive trait (f), what must be Donkey’s genotype if they have a baby that breathes fire?

• FF

• ff

• Ff

• F

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2