Biology 151 Exam 3 help A+ Pass
What process randomly recombines alleles? (From Mendel's Law: Alleles are separated
and randomly recombined.) - Answer ✔✔- Fertilization
Which of the following does NOT produce variation? - Answer ✔✔- Asexual
reproduction
Mitosis typically results in the production of ____. - Answer ✔✔- 2 identical diploid cells
When does DNA replication occur? - Answer ✔✔- Interphase
Meiosis typically results in the production of ___. - Answer ✔✔- 4 different haploid cells
Which of the following events does NOT occur during Prophase? - Answer ✔✔-
Centromeres Split
If a male and a female both carry a single recessive allele for an X-linked disorder who
will express it? - Answer ✔✔- males
In an autosomal recessive disorder the probability of two heterozygous parents
producing an unaffected child is ___. - Answer ✔✔- 75%
In meiosis, if a parent cell has 16 chromosomes, each daughter cell will have how many
chromosomes? - Answer ✔✔- 8
The following pedigree shows a trait that is autosomal dominant. - Answer ✔✔- True
DNA replication occurs between meiosis I and meiosis II. - Answer ✔✔- False
Assume a dimpled chin is dominant over an un-dimpled chin and freckles are dominant
to no freckles. If you cross 2 heterozygous parents what portion of the offspring will
have no dimples and no freckles? - Answer ✔✔- 1/16
The following karyotype represents a normal human female genome. - Answer ✔✔-
False
Crossing over is significant when it occurs between homologous pairs, but not when it
occurs between sister chromatids. - Answer ✔✔- True
How many traits can be observed with a di-hybrid cross? - Answer ✔✔- 2
, If a cross between purple flowers and white flowers yields 100% purple flowered
offspring which can you assume to be dominant? - Answer ✔✔- purple
Who is considered to be the "father of genetics"? - Answer ✔✔- Gregor Mendel
What kind of cells go through meiosis? - Answer ✔✔- germ-line cells (sex cells)
If gray wings (A) are dominant to black wings (a), then to determine the genotype of a
gray winged animal it should be crossed with ___. - Answer ✔✔- aa
What process separates alleles? (From Mendel's Law: Alleles are separated and
randomly recombined.) - Answer ✔✔- Meiosis
In meiosis, sister chromatids are separated from each other during _____. - Answer
✔✔- Anaphase ll
Put the following events of the cell cycle in order. (The first event will be 1, the second
will be 2, and so on...)
Sister chromatids line up along the equator of the cell.
Chromosomes condense, mitotic spindle forms, nuclear envelope breaks down, sister
chromatids attach to the spindle.
DNA is replicated.
Chromosomes reach opposite poles and de-condense, nuclear envelopes reform,
spindle is broken down.
Sister chromatids split at the centromere and move to opposite poles of the cell. -
Answer ✔✔- 3
2
1
5
What process randomly recombines alleles? (From Mendel's Law: Alleles are separated
and randomly recombined.) - Answer ✔✔- Fertilization
Which of the following does NOT produce variation? - Answer ✔✔- Asexual
reproduction
Mitosis typically results in the production of ____. - Answer ✔✔- 2 identical diploid cells
When does DNA replication occur? - Answer ✔✔- Interphase
Meiosis typically results in the production of ___. - Answer ✔✔- 4 different haploid cells
Which of the following events does NOT occur during Prophase? - Answer ✔✔-
Centromeres Split
If a male and a female both carry a single recessive allele for an X-linked disorder who
will express it? - Answer ✔✔- males
In an autosomal recessive disorder the probability of two heterozygous parents
producing an unaffected child is ___. - Answer ✔✔- 75%
In meiosis, if a parent cell has 16 chromosomes, each daughter cell will have how many
chromosomes? - Answer ✔✔- 8
The following pedigree shows a trait that is autosomal dominant. - Answer ✔✔- True
DNA replication occurs between meiosis I and meiosis II. - Answer ✔✔- False
Assume a dimpled chin is dominant over an un-dimpled chin and freckles are dominant
to no freckles. If you cross 2 heterozygous parents what portion of the offspring will
have no dimples and no freckles? - Answer ✔✔- 1/16
The following karyotype represents a normal human female genome. - Answer ✔✔-
False
Crossing over is significant when it occurs between homologous pairs, but not when it
occurs between sister chromatids. - Answer ✔✔- True
How many traits can be observed with a di-hybrid cross? - Answer ✔✔- 2
, If a cross between purple flowers and white flowers yields 100% purple flowered
offspring which can you assume to be dominant? - Answer ✔✔- purple
Who is considered to be the "father of genetics"? - Answer ✔✔- Gregor Mendel
What kind of cells go through meiosis? - Answer ✔✔- germ-line cells (sex cells)
If gray wings (A) are dominant to black wings (a), then to determine the genotype of a
gray winged animal it should be crossed with ___. - Answer ✔✔- aa
What process separates alleles? (From Mendel's Law: Alleles are separated and
randomly recombined.) - Answer ✔✔- Meiosis
In meiosis, sister chromatids are separated from each other during _____. - Answer
✔✔- Anaphase ll
Put the following events of the cell cycle in order. (The first event will be 1, the second
will be 2, and so on...)
Sister chromatids line up along the equator of the cell.
Chromosomes condense, mitotic spindle forms, nuclear envelope breaks down, sister
chromatids attach to the spindle.
DNA is replicated.
Chromosomes reach opposite poles and de-condense, nuclear envelopes reform,
spindle is broken down.
Sister chromatids split at the centromere and move to opposite poles of the cell. -
Answer ✔✔- 3
2
1
5
