Genetics Quiz Review

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT
• Tt
• tt
• tT

Tags

NGSS.HS-LS3-1

What do the letters inside the grid of a Punnett square represent?

• phenotypes of parents
• genotypes of offspring
• testcrosses of offspring
• chromosomes of parents

Tags

NGSS.HS-LS3-2

The term for a cross that involves just one trait, such as pod shape, is called a

• homozygous cross
• test cross
• monohybrid cross
• dihybrid cross

Which law states that the inheritance of one trait does not influence the inheritance of another?

• law of genetic linkage
• law of independent assortment
• law of segregation
• law of inheritance

Recessive alleles may not be expressed because they are

• masked by a dominant allele
• the least common allele in a population.
• the most common allele in a population.
• less likely to have crossing over.        

Which of the following events is an important factor in increasing variety among sexually reproducing organisms?

• test cross
• gene linkage
• crossing over
• mitosis

When is a recessive allele expressed in offspring?

• when two copies are present
• when parents have no dominant alleles
• when the offspring is heterozygous
• when one copy is present

Refer to the picture. What is the genotypic ratio of the offspring?

• 1YY:2Yy:1yy

• 4Yy

• 3Yy:1yy

• 2Yy:2yy

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Refer to the picture. What is the phenotypic ratio of the offspring?

• 4 yellow

• 2 yellow;2 green

• 4 green

• 3 yellow:1 green

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What is another term for "purebred"?

• homozygous

• heterozygous

• hybrid

• carrier