9th Grade Genetics Quiz

An organism that has two identical alleles for a trait designated by two uppercase letters

• heterozygous

• homozygous dominant

• homozygous recessive

If a human has blue eyes, which is a recessive trait, what is the genotype for that trait?

• two uppercase B's

• B b

• two lowercase b's

If a human is heterozygous for brown eyes, what is the genotype?

• two uppercase B's

• Bb

• two lower case b's

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-3

The physical expression of a gene is _____

• genes

• alleles

• genotype

• phenotype

Tags

NGSS.HS-LS1-1

Who is the "father of genetics" ?

• Oswald Avery

• Gregor Mendel

• Charles Darwin

• Craig Venter

Genetics is the study of _____

• ecosystems

• life

• inheritance

• cells

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Yellow peas are dominant to green peas. Referring to the Punnet Square, what is the phenotypic ratio?

• 2:2

• 3:1

• 1:2:1

• 4:0

Brown eyes are dominant to blue eyes. What is the genotypic ratio for the Punnet Square?

• 1:3

• 1:2:1

• 3:1

• 4:0

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The allele combinations for a trait

• alleles

• genes

• phenotype

• genotype

If an individual is heterozygous for a trait, what phenotype will they show?

• dominant

• recessive

• both

• none