Genetics Final Exam Correct
Questions & Solutions(RATED A)
,What significant genetic function occurs in the S phase of the cell cycle?
A. karyokinesis
B. chromosome condensation
C. cytokinesis
D. DNA synthesis - ANSWER D
If a typical somatic cell has 64 chromosomes, how many chromosomes are expected in each gamete of
that organism?
A. 8
B. 32
C. 64
D. 16 - ANSWER B
During interphase of the cell cycle, _____.
A. DNA content essentially doubles
B. DNA recombines
C. the nuclear membrane disappears
D. RNA replicates - ANSWER B
The chromosomal theory of inheritance _______.
A. is that genes for phenotypic traits are carried on chromosomes
B. was proposed because the behavior in mitosis is similar to that of genes during gamete formation
C. was proposed by Gregor Mendel
D. describes how chromosomes can be altered by mutation - ANSWER A
The complete genetic makeup of an organism is referred to as its:
A. alleles
B. phenotype
C. locus
, D. genome - ANSWER D
In Mendel's peas, yellow seeds are dominant to green. A pure-breeding yellow plant is crossed with a
pure-breeding green plant. All of the offspring are yellow. If one of these yellow offspring is crossed with
a green plant, what will be the expected proportion of plants with green seeds in the next generation?
A. 50%
B. 75%
C. 25%
D. 0% - ANSWER A
In animals, the inability to make the pigment melanin results in albinism, a recessive condition. Two
unaffected parents, who have decided to have three children, have a first child that has albinism
(genotype aa). What is the probability that the second and third children will also have albinism?
A. 1/16
B. 1/4
C. 9/16
D. 1/2 - ANSWER A
Two gene loci, A and B, assort independently, and alleles A and B are dominant over alleles a and b.
What is the probability of producing an AABB zygote from a cross of AaBb × AaBb?
A. 9/16
B. 1/4
C. 1/16
D. 1/2 - ANSWER C
In green Revolution, genetic techniques were used to
A. develop high-yielding strains of crops
B. develop numerous drugs and food additives
C. develop genetically engineered bacteria
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