please help me figure out these questions!!
The diagram to the right shows a haploid gamete that resulted from meiosis of a diploid cell. Stripes denote chromosomes inherited maternally, solid represents paternal chromosomes. The shapes represent different chromosomes. If you assume no crossing-over, which diagram below represents the diploid cell? (see image below)
What one event in meiosis makes it possible for chromosomes in gametes to have NEW combinations of genes?
Question options:
1)
cytoplasmic division during telophase II
2)
crossing-over during synapsis
3)
formation of the spindle in prophase I
4)
lining up of homologous chromosomes during metaphase I
Use the following diagram to answer questions 15-21 (see image below please)
The correct sequence of stages for the portion of the process shown above is.
Question options:
1)
1-3-2-4
2)
3-4-1-2
3)
3-1-4-2
4)
2-3-1-4
Use the diagram in question 15 to answer the following question.
The number of chromosomes in a gamete produced by this cell is
Question options:
1)
3
2)
24
3)
6
4)
12
Use the diagram in question 15 to answer the following question.
The first polar body is seen in stage.
Question options:
1)
1
2)
2
3)
3
4)
4
Use the diagram in question 15 to answer the following question.
Synapsis is first seen in stage
Question options:
1)
4
2)
1
3)
3
4)
2
Use the diagram in question 15 to answer the following question.
Tetrads are first visible in stage
Question options:
1)
2
2)
1
3)
4
4)
3
Use the diagram in question 15 to answer the following question.
The number of homologous pairs of chromosomes is
Question options:
1)
3
2)
12
3)
24
4)
6
Use the diagram in question 15 to answer the following question.
What phase would first indicate that nondisjunction had occured?
Question options:
1)
2
2)
1
3)
4
4)
3
Certain cells have twice as much DNA as other normal cells of the same organism. This is true of
Question options:
1)
a newly formed sperm cell.
2)
cells that are in an early stage of mitosis
3)
cells that show a decrease in activity of the ribosomes.
4)
an egg cell immediately before fertilization.
2
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