Mendelian Genetics and Monohybrid Crosses

Different version of genes are called what?

• Traits

• Alleles

• Genotype

• Phenotype

Tags

NGSS.HS-LS3-2

Distinguishing characteristics that are inherited

• alleles

• traits

• genes

• heredity

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

When two alleles are the same (ex:RR/rr) what is this known as?

• Homozygous

• Heterozygous

What is the different between dominant alleles and recessive alleles?

• Dominant- only will show up when there are two dominant alleles

• Recessive- only show up when there are two recessive alleles

• Dominant- will always show up no matter what.

• Recessive- will always show up no matter what.

A pea plant with wrinkled peas is crossed with a pea plant with smooth peas. All of the offspring produced have wrinkled peas. What can be inferred about the wrinkled pea trait?

• The wrinkled pea plant is dominant

• The wrinkled pea plant is recessive

• The wrinkled pea plant is a hybrid

• The wrinkled pea plant is codominant.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A mother is homozygous recessive for blue eyes, while the father is heterozygous for brown eyes. What percentage of the children will have brown eyes? How many possible phenotypes and genotypes will there be?

• 25%, 2, 1

• 50%, 1, 2

• 50%, 2, 2

• 25%, 1, 2,

Tags

NGSS.HS-LS3-1

NGSS.HS-LS4-3

A woman is pregnant and does not know the gender of the baby yet. What is the percentage of it being a boy.

• 25%

• 50%

What is the difference between phenotype and genotype?

• Genotype is the physical characteristics, while phenotype is the combinations of alleles

• They are interchangeable.

• Genotype is the combination of alleles while phenotype is the physical characteristics.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-3

Orange fur (R) is dominant over white fur (r) in rabbits. Fifty percent of the rabbits in the most recent litter have orange rabbits. What are the possible genotypes of the parents of this litter?

• RR: rr

• Rr: Rr

• Rr: rr

• Rr: RR

Tags

NGSS.HS-LS3-1

Astigmatism (represented by the letter A) is a common and generally treatable imperfection in the curvature of the eye that causes blurred distance and near vision. A man is heterozygous for astigmatism and the female is heterozygous for astigmatism. What is the percentage of offspring that will NOT have astigmatism

• 75%

• 25%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2