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Bio Reading Quiz Ch 13

Terms in this set (10)

Asexual reproduction __________.
produces offspring genetically identical to the parent
What number and types of chromosomes are found in a human somatic cell?
44 autosomes and 2 sex chromosomes
For what purpose(s) might a karyotype be prepared?
for prenatal screening, to determine if a fetus has the correct number of chromosomes

to determine whether a fetus is male or female

to detect the possible presence of chromosomal abnormalities such as deletions, inversions, or translocations

***The first three answers are correct.
Which of the following statements correctly describes how sister chromatids and homologous chromosomes differ from each other?
Homologous chromosomes contain the same gene loci but may have different alleles of a particular gene. Sister chromatids are identical copies of each other produced during DNA replication.
In a typical animal, mitosis produces _________, while meiosis produces____________.
two diploid daughter cells, four haploid daughter cells
Which of the following occurs during meiosis, but not during mitosis
synapsis occurs
Which of the following answers describes the phenomenon of crossing over in meiosis?
the exchange of homologous portions of nonsister chromatids
Heritable variation is required for which of the following?
evolution
Two sister chromatids are joined at the centromere prior to meiosis. Which statement is correct?
Barring mutation, the two sister chromatids must be identical.
During which of the following phases of meiosis do centromeres split and sister chromatids migrate to opposite poles of the cell?
anaphase II
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