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Studentka2010 [4]
3 years ago
7

Plz help What happens to chromosomes during crossing-over?

Biology
1 answer:
FromTheMoon [43]3 years ago
6 0

Answer:

How does crossing over affect the alleles of a chromosome?

Since the chromosomes are homologous, breaks at corresponding points mean that the segments that are broken off contain corresponding genes, i.e., alleles. ... Crossing over results in recombination of genes found on the same chromosome, called linked genes, that would otherwise always be transmitted together.

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A process that increases genetic diversity during meiosis is called
Irina18 [472]

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crossing over

Explanation:

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The following diagram shows sea cliffs and small, sandy beaches formed along a coastline.
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Weathering and erosion formed the cliffs, and deposition formed the beaches.

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5. Explain how selection might be different if there were brown grasshoppers in
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Explanation:

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A newborn with a cleft lip and palate is born to a mother who has a history of epilepsy. Which drug might be responsible for thi
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Topiramate

Topiramate is the drug which might be responsible for this malformation.  

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5 0
3 years ago
What statement about the mechanism of hunger and satiety is true?
disa [49]

Answer:

The correct answer is: The ventromedial hypothalamus plays a role in satiety.​

Explanation:

The hypothalamus is a part of the brain that controls many important bodily functions and connects both the nervous system with the endocrine system. The hypothalamus consists of several nuclei that have diverse functions and are located in 3 different regions.

The nucleus that plays a role in satiety is the ventromedial nucleus, terminating hunger and giving a sensation of fullness. It also plays a significant role in thermoregulation, among other things.

Neuropeptide Y, on the other hand, is a peptide that is released to make us feel hungry and encourage us to intake food (primarily carbohydrates).

Cholecystokinin is a hormone released by the small intestines after we had a meal, and its function is to improve digestion and make us feel full.

Fat cells DO release leptin, but the function of this hormone is to produce satiety, by stimulating anorexigenic (meaning they take hunger away) hormones and inhibiting orexigenic ones, like Neuropeptide Y.

7 0
3 years ago
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