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2 years ago

Which of the following is homozygous dominant? a AA b Aa c aa

Biology

1 answer:

GarryVolchara [31]2 years ago

6 0

Answer: a). AA

Explanation: Every trait is controlled by at least a pair of gene. Genes have different forms known as alleles. Alleles can be dominant or recessive. A dominant allele expresses itself in the presence of a recessive allele and masks the effect of a recessive allele. A recessive allele cannot express itself in the presence of a dominant allele and it's effect is masked by a dominant allele. Dominant alleles are usually written in upper cases such as A, T, while recessive alleles are usually written in lower cases such as a, t. The two alleles that determines a trait is called a genotype. A genotype can be homozygous if the two alleles are identical such as in AA or aa

and can be heterozygous if the two alleles are not identical such as in Aa, Tt.

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What explanation does this image tell about reproduction and variation?

Zigmanuir [339]

Answer:

See the answer below

Explanation:

First, the image tells that chromosomes are made up of genes or that genes are located on chromosomes. It further showed that genes are translated as proteins in the cell and this protein respectively control the expression of traits.

Secondly, it also showed that during sexual reproduction, the offspring produced usually have the same proteins as the parent and therefore have exactly the same traits as the parent. Only one parent is needed for asexual reproduction.

However, two parents are needed for sexual reproduction where each parent donate chromosomes containing gene to the genome of their offpsring. The mixture of genes ensures that the offspring look different from the parent.

The image further showed that asexual reproduction does not lead to any variation while sexual reproduction leads to variation of the offpsring from their parents.

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2 years ago

Need 11 facts about solar eclipse

SVEN [57.7K]

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8-Total solar eclipses produce harmful rays that can cause blindness.

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2 years ago

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What does common ancestor mean? URGENT

masya89 [10]

Answer:

I would say something descended from the same person if I should be not mistaken.

Explanation:

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2 years ago