Question

In: Biology

The table below shows the outcome of a crossing of two parents for which we are...

The table below shows the outcome of a crossing of two parents for which we are interested in the trait of color. No two crossings have the same parents genotypically for this trait. Knowing this, fill out the chart below, determine the pattern of inheritance displayed, and indicate the parental genotypes in each cross . Define the term co-dominance and incomplete dominance

Cross #	# of each Offspring Phenotype	Offspring Genotypes	Parental Genotypes
1	10 red and 10 green
2	15 red and 5 yellow
3	5 red, 10 orange, 5 yellow
4	20 green

Solutions

Expert Solution

Cross #1:

Offspring: 10 red and 10 green

R = red

r = green

Alleles	R	r
r	Rr	rr
r	Rr	rr

Red =2

green = 2

Genotype of offsprings = Red = Rr

green= rr

Genotype of parents = Rr and rr

Cross #2:

Offspring: 15 red and 5 yellow

R = red

r = yellow

Alleles	R	r
R	RR	Rr
r	Rr	rr

Red =3

Yellow = 1

Genotype of offsprings = Red = Rr and RR

Yellow= rr

Genotype of parents = Rr

Cross #3: It Is example of incomplete dominance.

Offspring: 5 red and 10 oranges, 5 yellow

R = red

r = yellow

Alleles	R	r
R	RR	Rr
r	Rr	rr

Red =1

Yellow = 1

Orange = 2

Genotype of offsprings = Red = Rr

Yellow= rr

Orange = Rr

Genotype of parents = Rr

Cross #4:

Offspring: 20 green

G = green

g= yellow

Alleles	G	G
g	Gg	Gg
g	Gg	Gg

Green = 4,

Genotype of offsprings = Green = Gg

Genotype of parents = GG and gg

Codominance= it occurs when two different alleles give their phenotype. So phenotype of both parent shown in offsprings.

Incomplete dominance = it occurs when two different alleles unable to express their phenotype. So a new trait will be shown.

gladiator answered 1 year ago

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