Question

Part 2: Data Tables

Table 1: Parent Genotypes: Monohybrid Crosses

Generation	Genotype of Individual #1	Genotype of Individual #2
P	Yy	SS
P1	Sy	Sy
P2	yS	yy
P3	Sy	Sy
P4	Sy	Sy

Table 2: Generation Data Produced by Monohybrid Crosses

Generation	Possible Offspring Genotypes	Possible Offspring Phenotypes	Genotype Ratio	Phenotype Ratio
P	YY Yy yy	Yellow or Blue	1:2:1	3:1
P1	YY Yy	yellow	1:1	1
P2	Yy yy	Yellow or Blue	1:1	1:1
P3	Yy yy	Yellow or Blue	1:1	1:1
P4	Yy yy	Yellow or Blue	3:1	3:1

Part 2: Post-Lab Questions

1. How much genotypic variation do you find in the randomly picked parents of your crosses?
2. How much in the offspring?
3. Pool all of the offspring from your five replicates. How much phenotypic variation do you find?
4. Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? Why or why not?
5. What is the difference between genes and alleles?
6. How might protein synthesis execute differently if a mutation occurs?
7. Organisms heterozygous for a recessive trait are often called carriers of that trait. What does that mean?

8.In peas, green pods (G) are dominant over yellow pods. If a homozygous dominant plant is crossed with a homozygous recessive plant, what will be the phenotype of the F₁ generation? If two plants from the F₁ generation are crossed, what will the phenotype of their offspring be?

PLEASE TYPE ANSWERS I HAVE DIFFICULTY READING THE ANSWERS WHEN WRITTEN

Answer 1

Answer-

According to the given question- following value are given-

In peas, the green pods (G) are dominant over yellow pods (g).

then a homozygous dominant plant is crossed with a homozygous recessive plant i.e. GG * gg

then

	g	g
G	Gg (Green pods)	Gg (Green pods)
G	Gg (Green pods)	Gg (Green pods)

• phenotype of the F₁ generation- are all heterozygous dominant and having Green colour pods.
• If two plants from the F₁ generation are crossed that means tro heterozygous green pods plant was crossed i.e. Gg * Gg then

	G	g
G	GG (Green pods)	Gg (Green pods)
g	Gg (Green pods)	gg (Yellow pods)

phenotype of their offspring will be -

3 out of 4 offspring have Green color pod while 1 out of 4 have yellow pods

phenotype ratio is

Green pods : Yellow pods are 3 : 1

Genotype ratio is Homozygous dominant Green pods : Heterozygous pods : homozygous Yellow pods

1: 2:1