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Svetlanka [38]
3 years ago
15

Explain why crossing-over is an important source of genetic variation. written response

Biology
1 answer:
iren2701 [21]3 years ago
3 0

Answer:

When crossing over occurs, alleles are exchanged between homologous chromosomes, leading to new combinations of alleles.

Explanation:

Hope this helps!

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Darina [25.2K]

Answer:

No, since DNA does code for certain traits, others are introduced or changed by the environment. For example, some adaptations are not coded in DNA, such as dying hair. According to the gene, hair is to be black, for example, but it can be changed to look pink. Another example is when a person is first born. When they are, some bacteria enter the system of the baby --- mostly good. Then the baby's gut will be different, and the bacteria in the gut are not coded by the DNA. So, living things are not only the product of DNA, as there are extraneous factors that affect living things as well.

Explanation:

Phew, that was long! Hope this helps (:

5 0
3 years ago
Answer and i will give brainly
Gekata [30.6K]

Answer:

Pneumonia

Explanation:

The answer is most likely Pneumonia as Emphysema doesnt usually have fluid in lungs as a symptom.

8 0
3 years ago
Read 2 more answers
Do you find some fine strands or thread like structure​
Dvinal [7]

Answer:

<h2>Hyphae are thread like structure.....</h2>

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7 0
3 years ago
In guinea pigs the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur (F) is d
galben [10]

Answer:

100%

Explanation:

This question involves two genes in guinea pigs; one coding for fur color and the other for fur length. The alleles of black fur (B) and short fur (F) is dominant over the alleles for brown fur (b) and long fur (f).

In a cross between two offsprings with genotypes: BBFF x bbff, the following gametes will be produced by each parent:

BBFF - BF, BF, BF, and BF

bbff - bf, bf, bf, bf

Using these gametes in a punnet square (see attached image), one will notice that all of the offsprings will have the genotype: BbFf i.e all or 100% of the offsprings are heterozygous for both of the genes or traits.

5 0
2 years ago
An enzyme in a cell became dysfunctional because of an alteration. As a result, the DNA strands would not separate to begin the
yanalaym [24]

Answer:

C. Helicases

Explanation:

Helicases to be termed as enzymes that is blind and contains acid i.e. remodel nucleic or have protein i.e. nucleic acid. It is important as the time of DNA replication as it divided the DNA i.e. double stranded into one single standard that permits each and every strand for copied it

Also it cracks the bonds i.e. hydrogen that lies between the two strands this could create a replication fork.

Therefore in the given case, the helicases is affected

3 0
2 years ago
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