,1. During which phase of the cell cycle does the cell
prepare for DNA replication?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
Correct Answer: A. G1 phase
Rationale: The G1 phase, or Gap 1 phase, is when the
cell grows and prepares for DNA replication, which occurs
in the subsequent S phase.
2. What is the result of nondisjunction during meiosis?
A. Diploid gametes
B. Haploid gametes
C. Polyploid gametes
D. Aneuploid gametes
Correct Answer: D. Aneuploid gametes
Rationale: Nondisjunction leads to gametes with an
abnormal number of chromosomes, known as aneuploidy,
due to the failure of homologous chromosomes or sister
chromatids to separate properly.
,independently of one another.
Correct Answer: A. Alleles for different traits are
distributed to sex cells independently of one another.
Rationale: The principle of independent assortment states
that the distribution of alleles for different genes is random
and independent of each other during the formation of
gametes.
4. In which phase of mitosis do the chromosomes align at
the cell's equatorial plate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: B. Metaphase
Rationale: During metaphase, chromosomes align at the
metaphase plate, or the equatorial plate, in preparation for
their separation into daughter cells.
, crossing over and independent assortment, which increase
genetic variation.
6. Which process during meiosis contributes to genetic
recombination?
A. DNA replication
B. Cytokinesis
C. Crossing over
D. Chromosome condensation
Correct Answer: C. Crossing over
Rationale: Crossing over, which occurs during prophase I
of meiosis, allows for the exchange of genetic material
between homologous chromosomes, leading to genetic
recombination.
7. How does the law of segregation relate to the behavior of
chromosomes during meiosis?
A. It states that chromosomes segregate independently
during meiosis.
B. It states that each gamete receives only one
chromosome from each pair.
C. It states that chromosomes replicate independently
before meiosis.
D. It states that each gamete receives two chromosomes
from each pair.
Correct Answer: B. Each gamete receives only one
chromosome from each pair.
Rationale: The law of segregation explains that during
meiosis, the two alleles for each gene separate, so each
gamete inherits only one allele from each pair of
homologous chromosomes.
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller emiliophd. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
