Practice Test Answers

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Which scenario breaks the law of segregation?

A
a gamete contains the father’s allele
B
the gamete fertilized has the dominant trait
C
a gamete produced has 2 of the same alleles after meiosis II
D
the gametes produced each have 1 allele after meiosis II
4

If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible?

A
cap f sub 1 generation only
B
cap p generation only
C
cap f sub 1 generation and cap f sub 2 generation
D
cap p generation and cap f sub 2 generation
5

Mendel’s pea plants had either purple or white flowers. This means that the plants

A
have two copies of a gene from one parent.
B
have two recessive traits.
C
have two alleles for the gene.
D
can self-pollinate.
7

The Punnett square predicts the ratio of genotypes in the offspring based on the genotypes of the parents. Which Punnett square represents a cross between a mom who is heterozygous for dimples and a dad who is homozygous for no dimples?

A
Image with description A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled Upper D and Upper D. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D Upper D, Upper D Upper D, Upper D Upper D.
B
Image with description A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, d d, d d, Upper D d.
C
Image with description A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled Upper D and d. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D d, d d, UpperD d.
D
Image with description A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, Upper D d, Upper D d, Upper D d.
8

Which are different forms of the same gene?

A
alleles
B
phenotypes
C
genotypes
D
traits
9

Who has hemophilia in the pedigree that is shown?

A
John and Ann
B
Fred and Luke
C
Ann and Marie
D
John, Charles, Jack, and Irene

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Practice Test Answers — Biology