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 hybrids?
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?

Answer and Explanation:

A) The allele for freckles is dominant (F), so if Neither Olivia nor Marcus has freckles, then their genotypes are recessive homozygote for the trait, this is "ff."

          1) Olivia genotype: ff

          2) Marcus genotype: ff

          3) 100% of their children will be recessive homozygote for the freckles gene, ff.

B) Hairline gene: Widow peak allele is dominant -W- over the strait hairline allele which is recessive -w-. Both Marcus and Olivia are heterozygous for the hairline trait, so both their genotypes are Ww for the trait.

C) Tongue´s roll trait: Tongue rolling is a dominant trait, T. Neither Marcus nor Olivia can roll their tongues, so their genotypes are tt.

D) Dimple is dominant. There are high possibilities of getting the dimples dominant allele in a family that already express the trait.

E) Free-lobule trait, E, is dominant over the attached-lobule trait, e.  Both parents are EE, homozygous dominant for the trait.  100% of the progeny will be homozygous dominant free lobules, EE. The ratio of free lobes to the attached lobes is 1 to 0.

F) The ability to taste bitter is dominant, T. So if Marcus cannot detect bitter taste, he is recessive homozygote for the trait, "tt". Olivia is a heterozygote for the trait, this is "Tt".

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.