BIO 1201 GREGG EXAM 3 2026 MOLECULAR
BIOLOGY DRILL PACK ANSWER SHEET
◉ Which of the following occurs in meiosis, but not mitosis?
Answer: Homologous chromosomes separate.
◉ Sister chromatids differ from nonsister chromatids in that sister
chromatids __________.
Answer: are products of the S phase of the cell cycle and are two
copies of one chromosome
◉ The major contribution of sex to evolution is that __________.
Answer: it provides a method to increase genetic variation
◉ __________ are a group of genetically identical individuals produced
by a process called __________.
Answer: Clones; asexual reproduction
◉ In meiosis, __________ of __________ cross over and form __________.
Answer: nonsister chromatids; homologous pairs; chiasmata
,◉ Unless the chromosomes were stained to show band patterns, a
karyotype would be least likely to show which of the following?
Answer: Part of a chromosome turned around.
◉ Regardless of whether an organism is an animal, a plant, a fungus,
or an algal cell, all zygotes are __________ and are formed during the
__________ of two __________ gametes.
Answer: diploid; fertilization; haploid
◉ Allelic variation is an important source of __________ in a
population.
Answer: genetic diversity
◉ Which of the following statements about homologous
chromosomes is correct?
Answer: They have genes for the same traits at the same loci.
◉ How many genes are present in the human genome?
Answer: Tens of thousands
◉ Characteristic of the bdelloid rotifer is that it __________.
Answer: is an example of an animal that has not reproduced sexually
in 40 million years
, ◉ A clone is the product of __________.
Answer: asexual reproduction and mitosis
◉ A pair of genetic structures carrying genes that control the same
inherited characters are called __________.
Answer: homologous chromosomes
◉ The process called __________ reduces the chromosome number by
__________.
Answer: meiosis; two consecutive cell divisions
◉ Somatic cells in humans differs from gametes in that human
somatic cells __________.
Answer: contain two sets of each of the 23 chromosome types
◉ The zipper-like complex that forms in meiosis occurs during
__________ and is called the __________.
Answer: prophase I; synaptonemal complex
◉ Ignoring crossover, how many kinds of gametes can be produced
by an organism with a diploid number of 8?
Answer: 16
BIOLOGY DRILL PACK ANSWER SHEET
◉ Which of the following occurs in meiosis, but not mitosis?
Answer: Homologous chromosomes separate.
◉ Sister chromatids differ from nonsister chromatids in that sister
chromatids __________.
Answer: are products of the S phase of the cell cycle and are two
copies of one chromosome
◉ The major contribution of sex to evolution is that __________.
Answer: it provides a method to increase genetic variation
◉ __________ are a group of genetically identical individuals produced
by a process called __________.
Answer: Clones; asexual reproduction
◉ In meiosis, __________ of __________ cross over and form __________.
Answer: nonsister chromatids; homologous pairs; chiasmata
,◉ Unless the chromosomes were stained to show band patterns, a
karyotype would be least likely to show which of the following?
Answer: Part of a chromosome turned around.
◉ Regardless of whether an organism is an animal, a plant, a fungus,
or an algal cell, all zygotes are __________ and are formed during the
__________ of two __________ gametes.
Answer: diploid; fertilization; haploid
◉ Allelic variation is an important source of __________ in a
population.
Answer: genetic diversity
◉ Which of the following statements about homologous
chromosomes is correct?
Answer: They have genes for the same traits at the same loci.
◉ How many genes are present in the human genome?
Answer: Tens of thousands
◉ Characteristic of the bdelloid rotifer is that it __________.
Answer: is an example of an animal that has not reproduced sexually
in 40 million years
, ◉ A clone is the product of __________.
Answer: asexual reproduction and mitosis
◉ A pair of genetic structures carrying genes that control the same
inherited characters are called __________.
Answer: homologous chromosomes
◉ The process called __________ reduces the chromosome number by
__________.
Answer: meiosis; two consecutive cell divisions
◉ Somatic cells in humans differs from gametes in that human
somatic cells __________.
Answer: contain two sets of each of the 23 chromosome types
◉ The zipper-like complex that forms in meiosis occurs during
__________ and is called the __________.
Answer: prophase I; synaptonemal complex
◉ Ignoring crossover, how many kinds of gametes can be produced
by an organism with a diploid number of 8?
Answer: 16
