Answer all the questions
Question 17
Review the four models below (the number show the number of chromosomes present in each cell):
image f62c7ddd3de644e5b4cb1a0097526d48
Which model correctly shows the results of mitosis?
a
Model 1 because during mitosis, two daughter cells receive half of the chromosomes of the parent cell.
b
Model 2 because during mitosis, one daughter cell receives the same number of chromosomes as the parent cell.
c
Model 3 because during mitosis, two identical daughter cells receive the same number of chromosomes as the parent cell.
d
Model 4 because during mitosis, four daughter cells receive one quarter of the chromosomes of the parent cell.
Question 18
Our cells have 23 pairs of chromosomes to replicate for cell division. While picking apples in the orchard, you accidentally cut your hand on a sharp twig. Your skin must make new cells to heal the cut.
What part of the cell cycle is shown and how many pairs of chromosomes are in the new formed cells?
a
G2 Checkpoint- checking cell size and DNA replication, 46 pairs of chromosomes
b
M-complete cell division, 23 pairs chromosomes
c
S- duplication of the DNA, 23 pairs chromosomes
d
G1 Checkpoint- checking cell size and for enough proteins, 46 pairs of chromosomes
Question 19
Review this diagram; select the response that BEST describes label #1.
Locus (genetics) - Wikipedia
a
centromere
b
chromatin
c
sister chromosomes
d
chromatid
Question 20
One disadvantage of asexual reproduction is
a
the parent and offspring have different traits
b
not enough offspring are created
c
organisms will never find love
d
competition for food and space to live can occur
Question 17
c. Model 3 because during mitosis, two identical daughter cells receive the same number of chromosomes as the parent cell.
Question 18
c. S- duplication of the DNA, 23 pairs chromosomes
Question 19
a. centromere
Question 20
d. competition for food and space to live can occur