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alekssr [168]
2 years ago
8

Humans have 23 pairs of chromosome in every body cell. Even one extra chromosome causes death or serious disorders. For example,

an extra copy of chromosome 21 causes Down syndrome. Which of the following are affected in a human being with an extra chromosome? Choose the 3 items that apply.
Biology
1 answer:
tamaranim1 [39]2 years ago
3 0

Explanation:

In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.

In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.

In the remaining cases, the error occurs after fertilization, as the embryo grows.

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Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.

Genetic mutations can occur during the life of a cell due to outside factors such as:

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That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of  <u>programmed cell death</u>.

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To learn more visit:

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4 0
2 years ago
Which of The Following is a Characteristic of Vertebrates A) An inner skeleton made of bone or cartilage B) Stinging Cells C) A
klasskru [66]
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4 0
3 years ago
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Extinction is the total loss of a species. How might changes in Habitat result in extinction?
ziro4ka [17]
ANSWER:

When a habitat is destroyed, the carrying capacity for indigenous plants, animals, and other organisms is reduced so that populations decline, sometimes up to the level of extinction. Habitat loss is perhaps the greatest threat to organisms and biodiversity.
6 0
3 years ago
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Answer: Very unlikely

Explanation:

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And this kind of point mutation is specifically called Missense mutation.

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