Mendelian Genetics

Which of the following is a homozygous dominant genotype?

• AA

• Aa

• aa

Which of the following is heterozygous genotype?

• AA

• Aa

• aa

Which of the following is a homozygous recessive genotype?

• AA

• Aa

• aa

Which of the following accurately matches genotypes with phenotypes if the inheritance pattern is complete dominance?

• AA-green

  Aa-green

  aa-yellow

• AA-green

  Aa-blue

  aa-yellow

• AA-green

  Aa-green and yellow

  aa-yellow

Tags

NGSS.HS-LS3-1

Two purple flowers self pollinate and produce a field of offspring. MOST of the flower offspring are purple but SOME are white. What does this tell you about the genotype of the parental generation.

• One flower is homozygous dominant and one is heterozygous.

• One is homozygous dominant and one is homozygous recessive.

• Both are homozygous recessive.

• Both are heterozygous.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If these same purple parental flowers continue to self pollinate, which would represent an ACTUAL percentage of the phenotype of their offspring.

• 50% white, 50% purple

• 44% white, 46% purple

• 28% white, 62% purple

• 62% white, 28% purple

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Green pea pod color is completely dominant to yellow pea pod color. Cross a heterozygous pea pod with a homozygous recessive pea pod. What is the genotypic and phenotypic ratios of their offspring?

• 100% Hh

  100% green

• 100% hh

  100% yellow

• 50% hh

  50% Hh

  50% yellow

  50% green

• 25% hh

  75% Hh

  25% yellow

  75% green

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Red flower color is completely dominant to white flower color. Cross two heterozygous flowers. What are the genotypic and phenotypic ratios of their offspring?

• 50% Gg

  50% GG

  100% Red

• 25% GG

  50% Gg

  25% gg

  50% Red

  50% White

• 25% GG

  50% Gg

  25% gg

  75% Red

  25% White

• 50% Gg

  50% gg

  50% Red

  50% White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In mice, yellow coat color is dominant to an agouti coat color. Mice that inherit two yellow alleles, however, die. If this allele is deadly, how does it continue to remain in the mice population?

• Heterozygous mice can pass the allele to offspring.

• Homozygous mice can pass the allele to offspring.

• A selective pressure selects for the homozygous allele.

• A selective pressure selects for the heterozygous allele.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Purple flower color is dominant to blue flower color. A purple and a blue flower self pollinate to reproduce. If the F1 generation of flowers produced are ALL purple, what do we know the genotypes of the parental generation to be?

• Ff anf Ff

• Ff and ff

• FF and FF

• FF and ff

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2