|
1
|
|
|
2
|
- Resulting cells have a different genetic configuration than the original
cell.
- End product is 4 haploid gametes
- 2 divisions occur, not 1
- Crossing over may occur
- 1 replication with 2 divisions
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3
|
- Genes on different chromosomes behave independently during meiosis.
- Separate chromosomes will separate into gametes independently of each
other.
|
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4
|
|
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5
|
|
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6
|
|
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7
|
|
|
8
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|
|
9
|
|
|
10
|
|
|
11
|
|
|
12
|
|
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13
|
- Human sperm contains 23 chromosomes, 22 of which are autosomes and 1
which is the sex chromosome.
Half the sperm have an X
sex chromosome, the other 1/2 has a Y sex chromosome.
- The ovum also contains 22 autosomes and 1 sex chromosome; its sex
chromosome has been designated X.
- XX zygote= female : XY zygote=
male
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14
|
- In a situation with Green (yy) and Round (RR) versus yellow (YY) and
wrinkled (rr)
- gametes would be yy X RR or 4 yR
- 4 Yr Heterozygotes for these traits would be
- Rr X Yy
and the four gametes would be:
|
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15
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|
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16
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|
|
17
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|
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18
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|
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19
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|
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20
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Notes
