Animal hair is made of

Biology

1 answer:

I am Lyosha [343]3 years ago

3 0

Answer: Option A) Amino acids

Explanation:

The animal hair has rich deposits of keratin, a protein that helps the hair stand erect, tough and rigid in its shaft.

And since protein are macromolecules made up of several units of amino acids, we can safely say animal hair is made of amino acids

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In humans, free earlobe are dominant to attached earlobe, and a straight thumb is dominant to a hitchhikers thumb. Cross two peo

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Answer:

The correct answer is - the phenotypic ratio would be 9:3:3:1.

Explanation:

The two traits that are dominant are free earlobe and straight thumb that are denoted by the E and T on their alternative recessive alleles attached lobe and hitchhiker thumbs denoted by the e and t respectively. The heterozygous condition will be EeTt.

The cross between EeTt and EeTt will produce gametes ET, Et, eT, and et by each. The phenotypic ratio of the cross would be 9:3:3:1, which means 9 out of 16 offspring will be dominant in both trait, 3 will be free lobe and hitchhiker thumb, 3 will be straight thumb and attached earlobe, and 1 will be recessive in both traits. For the cross please check the attached image.

Thus, the correct answer is - the phenotypic ratio would be 9:3:3:1.

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