Genetics Basics

One of Gregor Mendel's Laws had to do with

• Dominance and Recessiveness

• gravity

• inertia

• acceleration

Hh and hh will have ___ different genotypes.

• 3

• 4

• 2

• 6

Tags

NGSS.HS-LS3-3

2 different alleles

• homozygous dominant

• homozygous

• heterozygous

• purebred

Different forms of a gene

• alleles

• dominance

• recessive

Phenotype

• physical trait

• capital letter representing the dominant trait

• lowercase letter

• 2 alleles

Tags

NGSS.HS-LS3-3

In humans, the widow's peak allele is dominant and the no widow's peak allele is recessive. A person who is homozygous dominant would create gametes _________.

• W and w

• none of these answers

• W and W

• w and w

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Tallness (T) is dominant to shortness (t) in pea plants. Which of the following represents a genotype of a pea plant that is heterozygous for tallness?

• Tt

• TT

• tt

• Ss

Tags

NGSS.HS-LS3-2

Purple flowers are dominant over white flowers. What is the probability of white flowers in this cross: PP x pp

• 100%

• 50%

• 25 %

• 0 %

Given the cross of Bb x bb (brown eyes vs blue eyes) what would the ration of brown eyes to blue eyes be for the offspring? Simplify your answer.

• 2:2

• 1:3

• 1:1

• 3:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If B is brown hair and b is blond hair, and the parents, BB and bb, are crossed, what would the phenotype percentages be for the F2 generation?

• 75% brown hair, 25% blond hair

• 100% brown hair

• 25% brown hair, 50% blond hair

• 50% blond hair, 50% brown hair

Tags

NGSS.HS-LS3-1