In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus at
G2 of the cell division cycle?
A: 10
In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of the autosome pairs,
such as pair 14, which of the following do the two chromosomes of the pair have in common
A: ) length, centromere position, staining pattern, and traits coded for by their genes
What is a staining pattern?
If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in
a G1 cell?
A: 10
Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2
times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells
were isolated?
A: In the S phase
Motor proteins require which of the following structures or molecules to function in the movement of
chromosomes toward the poles of the mitotic spindle?
A: ATP as an energy source
Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is
not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many
chromosomes are in the cells of the underground stems?
A: 38
If a heterozygous F1 plant is backcrossed to the parent with round seeds (dominant), what proportion of
the progeny will have wrinkled seeds?
A: 0
E: cross Rr with RR (round seeds is homozygous dominant)
Draw:
A diploid cell is with 2n = 4 in prophase.
The cell is heterozygous for each of three genes: a, b, and c.
The maternal alleles are aM, bM, cM; the paternal alleles are aP, bP, cP. The a and b
genes are on the same chromosome. The c gene is on the other chromosome.
Make sure that:
Each chromosome has two replicated chromatids joined at the centromere. Chromosomes
are present as homologous pairs, with partners that are identical in size, shape, and
centromere placement.
Sister chromatids have identical alleles.
Maternal alleles aMand bMand the paternal alleles aPand bPare on different chromosomes.
G2 of the cell division cycle?
A: 10
In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of the autosome pairs,
such as pair 14, which of the following do the two chromosomes of the pair have in common
A: ) length, centromere position, staining pattern, and traits coded for by their genes
What is a staining pattern?
If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in
a G1 cell?
A: 10
Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2
times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells
were isolated?
A: In the S phase
Motor proteins require which of the following structures or molecules to function in the movement of
chromosomes toward the poles of the mitotic spindle?
A: ATP as an energy source
Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is
not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many
chromosomes are in the cells of the underground stems?
A: 38
If a heterozygous F1 plant is backcrossed to the parent with round seeds (dominant), what proportion of
the progeny will have wrinkled seeds?
A: 0
E: cross Rr with RR (round seeds is homozygous dominant)
Draw:
A diploid cell is with 2n = 4 in prophase.
The cell is heterozygous for each of three genes: a, b, and c.
The maternal alleles are aM, bM, cM; the paternal alleles are aP, bP, cP. The a and b
genes are on the same chromosome. The c gene is on the other chromosome.
Make sure that:
Each chromosome has two replicated chromatids joined at the centromere. Chromosomes
are present as homologous pairs, with partners that are identical in size, shape, and
centromere placement.
Sister chromatids have identical alleles.
Maternal alleles aMand bMand the paternal alleles aPand bPare on different chromosomes.
