BIO 101 EXAM #4 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
Which of the following statements is correct?
Answer:
Meiosis involves 2 divisions and produces 4 non-identical daughter
nuclei.
Question 2:
Down syndrome is associated with which of the following karyotypes?
Answer:
47, XY, trisomy 21
Question 3:
As the mother's age increases, the possibility of Down syndrome
increases because
Answer:
the possibility of nondisjunction increases.
Question 4:
Which of the diagrams best illustrates the appearance of a chromosome
pair in a cell at the end of prophase I?
Answer:
diagram 2
,Question 5:
Which of the diagrams represents a chromosome pair in a cell at the end
of prophase II?
Answer:
diagram 4
Question 6:
Which of the following is a correct match?
Answer:
separation of sister chromatids - anaphase II
Question 7:
A tetrad is composed of
Answer:
two chromosomes with two sister chromatids each.
Question 8:
What happens during crossing-over?
Answer:
genetic material is exchanged between nonsister chromatids, resulting in
new combinations of alleles.
Question 9:
In the human life cycle
Answer:
meiosis produces haploid gametes, and fertilization
, Question 10:
The failure of sister chromatids to separate during meiosis is called
Answer:
nondisjunction.
Question 11:
Which of the following processes does not contribute to creating genetic
variability in the offspring?
Answer:
interkinesis
Question 12:
Sister chromatids are identical DNA molecules, whereas homologous
chromosomes consist of two copies of the same type of chromosome
(one maternal, the other paternal).
Answer:
True
Question 13:
Which of the following is not a function of meiosis?
Answer:
cause an organism to grow
Question 14:
How does nondisjunction during meiosis I differ from nondisjunction in
meiosis II?
Answer:
Half of the gametes from nondisjunction during meiosis II will have normal
chromosome number.
Questions and Answers with Verified
Solutions
Question 1:
Which of the following statements is correct?
Answer:
Meiosis involves 2 divisions and produces 4 non-identical daughter
nuclei.
Question 2:
Down syndrome is associated with which of the following karyotypes?
Answer:
47, XY, trisomy 21
Question 3:
As the mother's age increases, the possibility of Down syndrome
increases because
Answer:
the possibility of nondisjunction increases.
Question 4:
Which of the diagrams best illustrates the appearance of a chromosome
pair in a cell at the end of prophase I?
Answer:
diagram 2
,Question 5:
Which of the diagrams represents a chromosome pair in a cell at the end
of prophase II?
Answer:
diagram 4
Question 6:
Which of the following is a correct match?
Answer:
separation of sister chromatids - anaphase II
Question 7:
A tetrad is composed of
Answer:
two chromosomes with two sister chromatids each.
Question 8:
What happens during crossing-over?
Answer:
genetic material is exchanged between nonsister chromatids, resulting in
new combinations of alleles.
Question 9:
In the human life cycle
Answer:
meiosis produces haploid gametes, and fertilization
, Question 10:
The failure of sister chromatids to separate during meiosis is called
Answer:
nondisjunction.
Question 11:
Which of the following processes does not contribute to creating genetic
variability in the offspring?
Answer:
interkinesis
Question 12:
Sister chromatids are identical DNA molecules, whereas homologous
chromosomes consist of two copies of the same type of chromosome
(one maternal, the other paternal).
Answer:
True
Question 13:
Which of the following is not a function of meiosis?
Answer:
cause an organism to grow
Question 14:
How does nondisjunction during meiosis I differ from nondisjunction in
meiosis II?
Answer:
Half of the gametes from nondisjunction during meiosis II will have normal
chromosome number.
