How can you tell whether or not there are blue kernels?

The Y was dominant.

Set up and complete a Punnett square for a cross of two of the F₁ from Step 1 (above).

Answer these questions:

What are the genotypes of the F₂ generation?

YY, Yy, yy

What are their phenotypes?

YY, Yy(yellow) , yy(blue)

Are there more or fewer blue kernels than in the F₁ generation?

           F2 generation has more blue kernels than F1.

Identify the four possible gametes produced by the following individuals (Y = yellow, y = blue, S = smooth, s = wrinkled):

YY Ss: YS Ys YS Ys

Yy Ss: YS Ys yS ys

Create a Punnett square using these gametes as P₁ and determine the genotypes of the F₁.

YS

Ys

YS

YYSS

YYSs

Ys

YYSs

YYss

yS

YySS

YySs

ys

YySs

               Yyss

What are the phenotypes? What is the ratio of those phenotypes?

          The phenotypes would be:

          (a) Yellow with smooth

          (b) Yellow with wrinkled

           3:1

Part 2: Data Tables

Table 1: Parent Genotypes: Monohybrid Crosses

Generation

Genotype of Individual #1

Genotype of Individual #2

P

Yy

Ss

P₁

Yy

Ss

P₂

Yy

ss

P₃

Yy

SS

P₄

YY

SS

Table 2: Generation Data Produced by Monohybrid Crosses

Generation

Possible Offspring Genotypes

Possible Offspring Phenotypes

Genotype Ratio

Phenotype Ratio

P

yySs

P₁

yySs

P₂

Yyss

P₃

YySS

P₄

YYSS

Part 2: Post-Lab Questions

How much genotypic variation do you find in the randomly picked parents of your crosses?

How much in the offspring?

Pool all of the offspring from your five replicates. How much phenotypic variation do you find?

Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? Why or why not?

What is the difference between genes and alleles?

How might protein synthesis execute differently if a mutation occurs?

Organisms heterozygous for a recessive trait are often called carriers of that trait. What does that mean?

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?

Part 3: Data Tables

Table 3: Parent Genotypes: Dihybrid Crosses

Generation

Genotype of Individual #1

Genotype of Individual #2

P

P₁

P₂

P₃

P₄

Table 4: Generation Data Produced by Dihybrid Crosses

Generation

Possible Offspring Genotypes

Possible Offspring Phenotypes

Genotype Ratio

Phenotype Ratio

P

P₁

P₂

P₃

P₄

Part 3: Post-Lab Questions

How similar are the observed phenotypes in each replicate?

How similar are they if you pool your data from each of the five replicates?

Is it closer or further from your prediction?

Did the results from the monohybrid or dihybrid cross most closely match your predicted ratio of phenotypes?

Based on these results, what would you expect if you were looking at a cross of 5, 10, or 20 independently sorted genes?

Why is it so expensive to produce a hybrid plant seed?

In certain bacteria, an oval shape (O) is dominant over round (o) and thick cell walls (T) are dominant over thin (t). Show a cross between a heterozygous oval, thick cell walled bacteria with a round, thin cell walled bacteria. What are the phenotypes of the F₁ and F₂ offspring?

Help Please! I got lost after a while. Thank you in advance!
Transcribed Image Text:1. Set up and complete Punnett squares for these crosses (remember Y = yellow, y = blue): a. YY and Yy YY YY Yy Yy b. YY and yy Yy Yy Yy Yy Page 3 of 9 4 of 863 words English (United States) Text Predictions: On * Accessibility: Investigate D Focus 100% EX
Transcribed Image Text:2. Answer these questions: a. What are the resulting phenotypes? 2 of YY(yellow), 2 of Yy(yellow), 4 of Yy(yellow) b. Are there any blue kernels? No © eScience Labs, 2018 aner

Question

The Y was dominant.

Set up and complete a Punnett square for a cross of two of the F₁ from Step 1 (above).
Answer these questions:
1. What are the genotypes of the F₂ generation?

YY, Yy, yy

YY, Yy(yellow) , yy(blue)

F2 generation has more blue kernels than F1.

Identify the four possible gametes produced by the following individuals (Y = yellow, y = blue, S = smooth, s = wrinkled):
1. YY Ss: YS Ys YS Ys
2. Yy Ss: YS Ys yS ys

Create a Punnett square using these gametes as P₁ and determine the genotypes of the F₁.

The phenotypes would be:

(a) Yellow with smooth

(b) Yellow with wrinkled

3:1

Part 2: Data Tables

Table 1: Parent Genotypes: Monohybrid Crosses

Table 2: Generation Data Produced by Monohybrid Crosses

Generation	Possible Offspring Genotypes	Possible Offspring Phenotypes	Genotype Ratio	Phenotype Ratio
P	yySs
P₁	yySs
P₂	Yyss
P₃	YySS
P₄	YYSS

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

Table 3: Parent Genotypes: Dihybrid Crosses

Table 4: Generation Data Produced by Dihybrid Crosses

Generation	Possible Offspring Genotypes	Possible Offspring Phenotypes	Genotype Ratio	Phenotype Ratio
P
P₁
P₂
P₃
P₄

How similar are the observed phenotypes in each replicate?
How similar are they if you pool your data from each of the five replicates?
Is it closer or further from your prediction?
Did the results from the monohybrid or dihybrid cross most closely match your predicted ratio of phenotypes?
Based on these results, what would you expect if you were looking at a cross of 5, 10, or 20 independently sorted genes?
Why is it so expensive to produce a hybrid plant seed?
In certain bacteria, an oval shape (O) is dominant over round (o) and thick cell walls (T) are dominant over thin (t). Show a cross between a heterozygous oval, thick cell walled bacteria with a round, thin cell walled bacteria. What are the phenotypes of the F₁ and F₂ offspring?

Help Please! I got lost after a while. Thank you in advance!

Accepted Answer

Answer image 1