Question

In: Biology

1) What is the probability that two individuals will have five sons in a row? 2....

1) What is the probability that two individuals

will have five sons in a row?

2. In humans, freckles are dominant over no freckles. A man with freckles marries a woman with no freckles. They have three children, two of whom have freckles and one of whom does not.

a. What is the man’s genotype?

b. What kind(s) of gametes can he produce?

c. What is the woman’s genotype?

d. What kind(s) of gametes can the woman produce?

e. What are the genotypes of the children with freckles?

f. What is the genotype of the child without freckles?

3. Free earlobes are dominant over attached earlobes. Chad, who has attached earlobes, marries Andrea, who has attached earlobes. Is it possible for them to have a child with free earlobes? Why or why not?

Expert Solution

1) Probability of having one son is 1/2=0.5

Probability of having next one male child is 1/2 x1/2

probability that two individuals will have five sons in a row = (1/2)⁵= 0.03125

2) F - Freckles (Dominant allele)

f - No freckles (recessive allele)

**Genotypes and phenotypes possible are

FF - Freckles

Ff - Freckles

ff - No freckles

*Man with freckles can have genotype FF or Ff

* Woman with no freckles can have genotype ff

**Children get one allele from each of the parents.

They have 2 children with freckles and one does not have freckles.

a) man's genotype will be Ff

Because they have one child with no freckles. If father has the genotype FF child will never have ff.

b) Gametes produces by man will have alleles F and f

c) Woman's genotype will be ff

d) Alleles produces by woman are f and f

e) Genotype of Children with freckles is Ff

F from father and f from mother.

f) Genotype of child with no freckles is ff

f from father and f from mother.

3. Free earlobes (F) dominant

Attached earlobes (f) recessive

FF - Free earlobes

Ff - Free earlobes

ff - attached earlobes

Chad has attached earlobes - Genotype is ff

Andrea has attached earlobes - Genotype is ff

All Children of theirs will have genotype ff

All children will have attached earlobes.

So it is not possible for them to have a child with free earlobes.

gladiator answered 1 year ago

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