Mendelian Genetics Exam Practice Questions and Answers (100% Pass)

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Mendelian Genetics Exam Practice
Questions and Answers (100% Pass)
If an organism has the following genotype (Bb) they are ________

Answers:
a. homozygous dominant

b. heterozygous for the dominant and recessive trait

c. homozygous recessive

d. heterozygous for just the recessive trait - ✔️✔️Selected Answer:
b. heterozygous for the dominant and recessive trait
"Given that B is the allele for black hair, b is the allele for blond hair, T is the allele for tall and t
is the allele for short, what is the correct genotype for an individual that is homozygous for blond
hair and homozygous for short?"

Answers:
a. bbtt

b. BBTt

c. BbTt

d. bbTt - ✔️✔️Selected Answer:
a. bbtt
"An individual has the following genotype (Bbtt) where B is the allele for black hair, b is the
allele for blond hair, T is the allele for tall and t is the allele for short. Which genes are
recessive?"

Answers:
a. blond hair and tall

b. blond hair and short

c. black hair and short


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d. black hair and short - ✔️✔️Selected Answer:
b. blond hair and short
"An individual has the following genotype (Bbtt) where B is the allele for black hair, b is the
allele for blond hair, T is the allele for tall and t is the allele for short. Which genes are
dominant?"

Answers:
a. black hair and tall

b. blond hair and tall

c. black hair and short

d. blond hair and short - ✔️✔️Selected Answer:
a. black hair and tall
"An individual has the following genotype (Bbtt) where B is the allele for black hair, b is the
allele for blond hair, T is the allele for tall and t is the allele for short. For which allele(s) is the
individual homozygous?"

Answers:
a. t

b. T

c. B

d. b - ✔️✔️Selected Answer:
a. t
How many unique gametes could be produced through independent assortment by an individual
with the genotype AaBbCCDdEE?

Answers:
8

16

4

32


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64 - ✔️✔️Selected Answer:
8
A cross between homozygous purple-flowered and homozygous white-flowered pea plants
results in offspring with purple flowers. This demonstrates

Answers:
the mistakes made by Mendel.

dominance

a dihybrid cross

the blending model of genetics

true-breeding - ✔️✔️Selected Answer:
dominance
Mendel's observation of the segregation of alleles in gamete formation has its basis in which of
the following phases of cell division?

Answers:
Prophase I of meiosis


Prophase II of meiosis

Metaphase I of meiosis

Anaphase I of meiosis

Anaphase of mitosis - ✔️✔️Selected Answer:
Anaphase I of meiosis
Mendel accounted for the observation that traits which had disappeared in the F1 generation
reappeared in the F2 generation by proposing that

Answers:
new mutations were frequently generated in the F2 progeny, "reinventing" traits that had been
lost in the F1

the traits were lost in the F1 due to blending of the parental traits


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