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There are six people in the Fisher family. Olivia and Marcus are the parents. They have four children: Violet, Nathan, Jonas, and Claudia.

Neither Olivia nor Marcus have freckles.

What is Olivia's genotype?
What is Marcus' genotype?
What is the probability that each child has of inheriting freckles?
Both Marcus and Olivia are heterozygous for the hairline trait.

What is the probability that each of their children could inherit a widow's peak?
What is the probability that each of their children could inherit a straight hairline?
What is the probability that each of their children could be homozygous dominant for the trait?
Neither Marcus nor Olivia can roll their tongues.

How many of their children could be born with the ability to roll their tongues?
How many of their children could be heterozygous?
What is the genotype of the whole family?
All four children have dimples.

What is likely the genotypes of their parents?
Do we know with certainty that one of the parents has to have dimples?
Both Olivia and Marcus are EE for the earlobe trait.

Among their children, what is the ratio of free earlobes to attached earlobes?
What percentage of the children are homozygous?
Marcus can not detect the bitter taste. Olivia has been found to be able to detect the bitter taste, but she is heterozygous for the trait.

What is the probability that each of their children could taste the ptc paper?
If Violet can not taste the ptc paper, what is Violet's genotype?
Given what you know, how many of the family can taste the ptc paper?

Respuesta :

1.

Freckles are caused by a dominant allele (F).

Marcus and Olivia have recessive homozygotes for the characteristic, ff, if neither of them has freckles.

Olivia's genotype is thus ff.

Marcus has a ff genotype.

Given that they are both recessive homozygotes for the ff gene, there is little chance that their offspring will have freckles.

2.

The straight hairline allele, W is recessive to the widow peak allele, W.

Marcus and Olivia share the hairline trait heterozygosity Ww.

The likelihood of a widow having children is highest when:

Ww = Ww, Ww, Ww, and ww

Widow's peak probability (WW or Ww) equals 3/4

The likelihood that a youngster will have a straight hairline is 1/4.

The likelihood that the offspring will be homozygous

3.

The attached-lobule trait, e, is recessive to the free-lobule trait, E.

The trait, EE, is homozygous dominant in both parents.

One to zero is the ratio of free to connected lobes.

The offspring will be homozygous dominant free lobules, EE, in all cases.

4.

The ability to taste bitter flavors is dominant (T).

Marcus is a recessive homozygote for the trait "tt" since he cannot sense bitterness.

Olivia possesses a "Tt" heterozygote for the trait.

Tt tt equals Tt, Tt, tt, and tt.

There is a 50% chance that each of their kids will try the PTC paper.

Violet's genotype is tt since she cannot taste PTC paper.

5.

T, tongue rolling is a dominant characteristic.

Marcus and Olivia both have tt genotypes since neither of them can roll their tongues.

tt = tt = tt = tt

Therefore;

Their offspring won't be able to roll their tongues.

No hybrids will be born to them.

The entire family shares the genetic tt.

6.

A dimple is a dominant trait (D)

The four youngsters all have dimples.

Therefore,

It's possible that both of their parents carry the dominant allele for the characteristic "DD" or

One of them is heterozygous, or "Dd," and the other is homozygous.

The dominant h0m0zygote "DD" is one of them, while the recessive h0m0zygote "dd" is the other.

Therefore, at least one parent must have a dimple.

learn more about dominant and recessive alleles here: https://brainly.com/question/15726066

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