Mendelin Inheritance

Hh

• Homozygous genotype

• Heterozygous genotype

• Homozygous dominant genotype

• Homozygous recessive genotype

Answer explanation

The correct choice is 'Heterozygous' because 'Hh' represents a genotype with two different alleles, one dominant and one recessive.

hh

• Heterozygous genotype

• Homozygous dominant genotype

• Homozygous recessive genotype

Answer explanation

The correct choice is 'homozygous recessive' because 'hh' represents a genotype with two of the same alleles, both recessive.

HH

• Heterozygous genotype

• Homozygous dominant genotype

• Homozygous recessive genotype

Answer explanation

The correct choice is 'homozygous dominant' because 'HH' represents a genotype with two of the same alleles, both dominant.

Brown eyes (B) are dominant to blue eyes (b). If Noah has blue eyes, what would his genotype for eye color be?

• bb
• BB

• Bb

• BB or Bb

Answer explanation

Since blue eyes are recessive, the only way to have blue eyes if if the genotype is homozygous recessive (bb).

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Based on the provided information, which letter would be assigned to represent the allele for black wings?

• B

• b

Answer explanation

"black wings are dominant", and dominant alleles are assigned an uppercase letter,

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Based on the provided information, which letter would be assigned to represent the allele for white wings?

• B

• b

Answer explanation

"black wings are dominant to white wings", so the white allele is recessive. Recessive alleles are assigned a lowercase letter.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The white winged moth would have the genotype

• BB

• Bb

• bb

• BB or Bb

Answer explanation

Because the white allele is recessive, bb is the only way to show the white phenotype.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The homozygous dominant moth would have the genotype

• BB

• Bb

• bb

• BB or Bb

Answer explanation

Homozygous dominant means two of the same dominant alleles.

Tags

NGSS.HS-LS3-1

Which answer choice shows both of the parental genotypes to be crossed?

• bb x bb

• Bb x BB

• Bb X Bb

• bb x BB

Answer explanation

A cross between a white winged moth (bb) and a homozygous dominant moth (BB).

Tags

NGSS.HS-LS3-1

Curly hair (H) is dominant to straight hair (h). If Paul has curly hair, what is his genotype for this hair gene?

• hh

• HH

• Hh

• HH or Hh

Answer explanation

Since curly hair is dominant, someone could have curly hair with the genotype HH or Hh. It only takes 1 dominant allele to express the dominant trait.

Tags

NGSS.HS-LS3-1