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rjkz [21]
3 years ago
10

In one kind of abnormal chromosome inheritance called down syndrome, a child has three copies of

Biology
1 answer:
umka2103 [35]3 years ago
3 0
The answer would be B. chromosome 21 

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Who an help me science
aleksandr82 [10.1K]

It would be A; Or 0 because since the dominate trait is being able to roll the tongue, it over rules the recessive.

3 0
3 years ago
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How does the recesive sickle-cell allele stay in the gene pool
Zina [86]

Answer:

Because natural selection selects for it. Thus it persists.

Explanation:

You have to understand heterozygote advantage. Basically, it's where heterozygotes have an advantage over homozygotes. In the case of sickle cell disease, heterozygotes have an advantage, and natural selection favors whatever is advantageous. Thus, because heterozygotes each have one recessive sickle-cell allele, as natural selection favors the heterozygotes, the recessive sickle-cell allele persists and remains in the gene pool.

7 0
3 years ago
Winds in our atmosphere are created as a result of which of the following processes?
shusha [124]

Answer:

<em>The correct option is D) Uneven heating of the air in the atmosphere</em>

Explanation:

Wind can simply be described as air which is moving or which is in motion. The uneven heating of the Earth's surface caused by the sun is the reason why winds occur. The difference in pressure of one area to another area causes the air to move and cause wind. The air tends to move from an area of higher pressure to an area of lower pressure and such is the movement of the wind.

4 0
3 years ago
How does industrial biotechnology differ from earlier forms of biotechnology?
NemiM [27]
I think it differs since the technology used before is kind of analog and the technology used now is kind of upgraded which has a higher storage capacity
5 0
3 years ago
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Which best describes the role of a producer in an ecosystem?
Igoryamba
<span>B. A producer supplies energy for the consumers in the ecosystem.

In science, a producer is an organism that can create it's on food and serves as food for a consumer. An example of a producer could be seaweed, or algae. 
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7 0
3 years ago
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