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klasskru [66]
3 years ago
13

Which of the following statements is true?

Biology
1 answer:
fiasKO [112]3 years ago
3 0

<u>Answer:</u> Mutations are the most fundamental way to add new genes to a gene pool.

<u>Explanation:</u>

Mutation refers to the process through which the normal sequence of altered. It may be either acquired or hereditary. It leads to addition of new genes to a gene pool.

The reason for not considering other statements as true are:

1. It is the hereditary mutation that are passed form parent to offspring's and acquired mutation is caused by external factors.

2. Acquired mutation are caused by external factors such as radiation.

3. Germ line mutation are important to evolution because they can be inherited.

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In humans, to fold the tongue is a dominant trait (L), and the straight tongue is the recessive trait. What are the probabilitie
kaheart [24]

The given question is incomplete as the genotype of the parents is not given, so the answer is providing in the followings case:

1. dominant parent and recessive parent

2. heterozygous parents

Answer:

1. dominant parent and recessive parent:

dominant parents can be represented by LL and recessive parent is represented by ll, so the gametes would be L, L and l, l.

so,

 L    L

l  Ll   Ll

l  Ll   Ll

so there are all offspring in heterozygous condition as we known one or two dominant allele masks the recessive allele for the trait so 100% offspring can fold their tongue.

2. heterozygous parents

In this case, parents have Ll genotype and gametes would be L and l for each parent so,

    L    l

L   LL  Ll

l    Ll    ll

In this case, one is pure dominant and two heterozygous whereas only one is recessive so, the phenotype of offspring that cant fol the tongue would be:

3/4 = 75%

6 0
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