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Lera25 [3.4K]
3 years ago
14

(NEED ASAP!) how does crossing over during meiosis allow for genetic variablity?

Biology
1 answer:
swat323 years ago
5 0
Homologous chromosomes pair, then the chromosomes cross over in certain points. Then the Chromosomes break up and then pair again which results in different genes since they traded. Which is the result of genetic variability.
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What to do if you get ulcerations in your throat from doxycycline?
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7 0
4 years ago
Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patient
klio [65]

Answer:

One-half of the daughters of an affected man would have this condition.

Explanation:

Each daughter born to a woman that is positive for a dystrophin mutation on one of her two X chromosomes possess a 50 percent likelihood of possessing the mutation and also becoming a carrier. Carriers at times do not show the disease symptoms but may give birth to a child that has the mutation or the disease condition. DMD carriers do have a higher chance of cardiomyopathy.

A man with DMD cannot transfer the affected gene to his sons since he passes to his son a Y chromosome, not the X chromosome. But he will definately transfer it to his daughters, since each daughter possess her father’s only X chromosome resulting in the daughters being carriers.

Hence, One-half of the daughters of an affected father and a carrier mother could have this condition.

3 0
3 years ago
Which of the following shows an example of data being collected?
serious [3.7K]

Answer:

C

Explanation:

she is collecting data by counting the number of eggs that were laid

4 0
3 years ago
if a pure breeding brown coloured rat BB is crossed with a pure breeding white rat bb, using the diagram only show the genotype
muminat

F2 generation genotype: BB,2Bb,bb

5 0
3 years ago
Read 2 more answers
Drag each tile to the correct box
scoundrel [369]
We need the context of the work of you want us to answer
6 0
3 years ago
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