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Please assist with the following. Please no hand-written work, but typed work and thorough explanations please including Punnett Squares. Please Ignore Sex, as these are not sex-linked traits

Dihybrid Cross (each cross involves two traits)

Question: Develop a hypothesis to predict the results of the following cross (dihybrid cross: ebony body female crossed with a vestigial winged male). Describe the phenotypic ratio that you would expect to see in the F1 generation of this cross. Explain your answer.

Question: Describe the phenotypic ratio that you would expect to see in the F2 generation of this cross. Explain your answer. (NOTE: You will use this ratio in the Chi-Square Test below.)

3. Perform a dihybrid cross between an ebony body female and a vestigial winged male:

ENTER DATA HERE: Show results for the F1 offspring.

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: How does the observed phenotypic ratio for the F1 generation compare with your predicted phenotypic ratio? Explain your answer.

ENTER DATA HERE: Show results for the F2 offspring (obtained by crossing an F1 female with an F1 male).

ENTER DATA HERE: Show results for Chi-Square Test of the F2 generation. (NOTE: use the ratio from your hypothesis above.)

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: How does the observed phenotypic ratio for the F2 generation compare with your predicted phenotypic ratio? Explain your answer.

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Related questions

Please assist with the following. Please no hand-written work, but typed work and thorough explanations please including Punnett Squares. Please Ignore Sex, as these are not sex-linked traits

Dihybrid Testcrosses

In the following crosses, the wild trait is dominant and the brown trait for eye color and ebony trait for body color are both recessive. You will compare the offspring of homozygous wild flies to the offspring of heterozygous wild flies, when each is crossed with a recessive brown-eyed fly with an ebony body.

7. Perform a monohybrid cross between a wild-type female fly and a male fly with brown eyes and ebony body.
Show results for the F1 offspring. (NOTE: You will use one of these F1 flies in the next cross.)
ENTER DATA HERE:

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: By examining the offspring, determine whether the wild-type female parent was homozygous or heterozygous for eye color and body color. How did you arrive at this conclusion?

Question: Are the F1 offspring homozygous or heterozygous for eye color and body color? How did you arrive at this conclusion?

8. Now perform a cross between one wild-type F1 offspring from the previous cross and a male fly with brown eyes and ebony body.
ENTER DATA HERE:

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: Even though you already knew the genotype of the wild-type fly used in this cross, how can you tell by examining the offspring of this cross whether the wild-type fly in this cross was homozygous or heterozygous for eye color?

Question: What was the phenotypic ratio for the offspring resulting from this testcross?

Please assist with the following. Please no hand-written work, but typed work and thorough explanations please including Punnett Squares. Please Ignore Sex, as these are not sex-linked traits

2. b. Perform a monohybrid cross between a wild-type female fly and a male fly with curved wings.

ENTER DATA HERE: Show results for the F1 offspring including Punnett Square

ENTER DATA HERE: Show results for the F2 offspring including Punnett Square

ENTER DATA HERE: Show results for Chi-Square Test of the F2 generation—predicted 3:1 ratio including Chi-Square or Punnett Square if applicable

Question: Is the curved wing trait dominant or recessive? How can you tell?

Please explain, and no hand-written work please, please type answer

Sex-Linked Traits (traits located on the sex chromosomes—usually the X chromosome)

Follow the directions for the lab. Enter data you obtain for the following crosses and answer questions on this answer sheet. (NOTE: The traits used in this Module 3 Lab are sex-linked. Therefore, you CANNOT click the “ignore sex” button for these crosses. You need to see separate results for males and females to analyze data for sex-linked traits.)

Question: In this lab exercise, should you click the "ignore sex" button for the crosses?

1. a. Perform a monohybrid cross between a female fly with a tan body and a wild-type male fly. Show results for the F1 offspring. (NOTE: You will use these F1 flies in the next cross.)
ENTER DATA HERE:

Question: Are the phenotypes of the F1 offspring what you would have predicted for this cross: why or why not?

Question: Each F1 female received a tan allele from her mother and a wild allele from her father. Why do all of the F1 females show the wild-type phenotype?

Question: Compare the number and type (X or Y) of sex chromosomes found in female and male flies.

Question: Compare the number of alleles present on the X and Y chromosomes.

Question: How can you tell that tan body is a sex-linked trait?

Question: How can you tell whether tan body is located on the X chromosome or the Y chromosome?

Question: If tan body was located on the Y-chromosome, what would be the phenotype of all the male F1 offspring? Is this what you obtained for the cross above?

Question: If tan body was located on the Y-chromosome, could females even show the trait? (HINT: When analyzing the cross results, remember that Y-linked traits are passed down only from affected males to their sons. Females cannot display Y-linked traits since they do not have Y chromosomes. On the other hand, both males and females can inherit X-linked traits since they both have X chromosomes.)

PUNNETT SQUARE:

List the genotypes of the parent flies in this cross (HINT: You must use X and Y symbols):

List the gametes produced by each parent fly in this cross:

Show the Punnett Square for the above cross.

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