BIOLOGY Lab Report: Genetic Crosses 2

Question

1.    Determine the genotype of each parent plant and write them below. Use W to indicate the allele for white flowers and w to indicate the allele for red flowers.

Genotype of homozygous parent plant with white flowers: WW

Genotype of homozygous parent plant with red flowers: ww

Answer:

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(Score for Question 2: Click or tap here to enter text. of 4 points)

2.    Next, think about the gametes each parent plant will produce. List the allele in each gamete.

Parent plant with white flowers:

Gamete 1:

Gamete 2:

Gamete 3:

Gamete 4:

Parent plant with red flowers:

Gamete 1:

Gamete 2:

Gamete 3:

Gamete 4:

3.    The two parent plants are the P generation, or parent generation. Create a Punnett square to show their offspring, the F1 generation.

Part 1 Punnett Square

4.    What pattern do you notice in the genotypes of the F1 generation snapdragons?

5.    What are the phenotypes of the F1 generation snapdragons?

1.    What are the genotypes of the F1 parent plants?

Genotype of F1 parent plant 1:

Genotype of F1 parent plant 2:

2.    Next, think about the gametes each parent plant will produce. List the allele in each gamete.

F1 parent plant 1:

Gamete 1:

Gamete 2:

Gamete 3:

Gamete 4:

F1 parent plant 2:

Gamete 1:

Gamete 2:

Gamete 3:

Gamete 4:

Answer:

Type your answer here Click or tap here to enter text.

(Score for Question 3: Click or tap here to enter text. of 2 points)

3.    Create a Punnett square showing a cross between the two F1 parent plants. Their offspring are the F2 generation.

Part 2 Punnett Square

4.    What are the genotypes of the F2 generation?

5.    What are the phenotypes of the offspring from this cross?

6.    Calculate the percentages of the phenotypes of the F2 generation.

Blood Type	Allele	Possible Genotype(s)	Possible Allele(s)
A		AA or AO	or
B		BB or BO	or
AB		AB
O	i	OO	ii

(Score for Question 1: Click or tap here to enter text. of 2 points)

1.    Imagine that you are studying two parents who are considering having children. One parent is has the genotype  and the other has the genotype. Create a Punnett square to calculate the possible genotypes of their children.

Part 3 Punnett Square

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2.    Look at the table at the beginning of Part 3. What are the possible phenotypes (blood types) of the children?

1.    What is the genotype of a male with red-green color blindness?

2.    What is the genotype of a female who is not color-blind but is a carrier of red-green color blindness?

(Score for Question 3: Click or tap here to enter text. of 2 points)

3.    Even though red-green color blindness is a recessive trait, can a female have red-green color blindness? Explain.

4.    A man who is color-blind marries a woman who is not color-blind and is not a carrier of the allele for color blindness. Create a Punnett square to predict the possible genotypes of their children.

Part 4 Punnett Square

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	Click or tap here to enter text.	Click or tap here to enter text.

(Score for Question 5: Click or tap here to enter text. of 1 points)

5.    Will all of the female children be carriers of the color-blind allele, or will none be carriers? Explain.

(Score for Question 6: Click or tap here to enter text. of 1 points)

6.    Will all of the male children be color-blind, or will none be color-blind? Explain.

Answer 1

Aloha Nadia,

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