Question

In: Biology

You set up a cross using two corn plants with green seedlings and obtain the following...

You set up a cross using two corn plants with green seedlings and obtain the following progeny (6 points):

3583 green seedlings

853 white seedlings

260 yellow seedlings

Assign genotypes for seedling color
What is the hypothesized mode of inheritance for seedling color?

c. Perform a Chi-square analysis to test the hypothesis stated in part (b) of this question

Expert Solution

a & b).

3583 : 853 : 260 is more or less to similar witu 12:3:1 ratio. This ratio appears in dominant epistasis.

When a dominant allele at one locus can mask the expression of both alleles (dominant and recessive) at another locus, it is known as dominant epistasis.

Explanation:

Green = A_B_ or A_bb

White = aaB_

yellow = aabb

c).

AaBb (green) x AaBb (green)---Parents

Aa x Aa = A_ (3/4) & aa (1/4)

Bb x Bb = B_ (3/4) & bb (1/4)

A_B_ = 3/4 * 3/4 = 9/16

A_bb = 3/4 * 1/4 = 3/16

Green = A_B_ + A_bb =9/16 + 3/16 = 12/16

White = aaB_ = 1/4 * 3/4= 3/16

Yellow = aabb = 1/4 * 1/4 = 1/16

Expected progeny:

Total progeny = 4696

Green = 12/16*4696 = 3522

White = 3/16 * 4696 = 880.5

Yellow = 1/16 * 4696 = 293.5

Phenotype	Observed(O)	Expected (E)	O-E	(O-E)2	(O-E)2/E
Green	3583	3522	61	3721.00	1.0565
White	853	880.5	-27.5	756.25	0.8589
Yellow	260	293.5	-33.5	1122.25	3.8237
Total	4696	4696			5.7391

Chi-square value = 5.74

Degrees of freedom = no. of phenotypes - 1

DF = 3-1=2

P value = 5.99

The chi-square value of 5.74 is less than the p value of 5.99. Hence, null hypothesis is accepted and the populations support the dominant epistasis mode of inheritance.

gladiator answered 1 year ago

How do you set up & determine the results of a dyhybrid cross?

Corn #2 is a standard F2 generation dihybrid cross. The traits you will be following is...

Corn #2 is a standard F2 generation dihybrid cross. The traits you will be following is color and seed shape. The following counts, in red, were determined in the lab Number of yellow, round 147 Number of purple, round 452 Number of yellow, wrinkled 43 Number of purple, wrinkled 151 What is the expected ratio? Perform a chi square below. Determine your probability value ______ and analyze what that means.

You carry out a test cross to a DdNn plant and obtain the following: 74DdNn, 24...

You carry out a test cross to a DdNn plant and obtain the following: 74DdNn, 24 Ddnn, 16 ddNn, 86ddnn. What is the map distance between genes D and N?

Using the Born approximation, obtain an integral expression for the total cross section for scattering of...

Using the Born approximation, obtain an integral expression for the total cross section for scattering of particles of mass m from the attractive Yukawa potential V(r) = - V0 exp [ -(r/a)²]

You set up a dihybrid cross between true-breeding tall pea plant with white flowers and a...

You set up a dihybrid cross between true-breeding tall pea plant with white flowers and a true-breeding short pea plant with purple flowers. Your F1 generation looks uniformly tall with purple flowers. The results of the F2 generation counts are shown in the table below: Phenotype Number of progeny Tall/purple flowers 850 Short/purple flowers 350 Short/white flowers 87 Tall/white flowers 313 Your calculated Chi square test statistic for this analysis is: a. 8.31 b. 3.37 c. 4.19 d. 16.3 e....

Suppose an agricultural scientist plants two different types of corn seed to test the claim that...

Suppose an agricultural scientist plants two different types of corn seed to test the claim that they produce the same average yield. The seeds are planted on eight randomly selected plots of land, each of which has one half of the plot planted with Type 1 seed and the other half planted with Type 2 seed. Calculate a 95% confidence interval estimate for the mean difference between the yield for Type 1 seed (Population 1) and Type 2 seed (Population...

Is it possible for a cross of two green parakeets to produce a white parakeet? How...

Is it possible for a cross of two green parakeets to produce a white parakeet? How would this work?

Summarize the function of the two photosystems in green plants and describe the flow of electrons.

Use this information to answer Questions 1 - 4 below. You cross two homozygous pea plants....

Use this information to answer Questions 1 - 4 below. You cross two homozygous pea plants. One parent has round peas, terminal flowers, violet petals, and constricted pods, while the other parent expresses the alternate phenotypes of wrinkled peas, axial flowers, white petals, and full pods. The four traits are controlled by four different genes, each on a separate chromosome.In the F1, all plants have round peas, axial flowers, violet petals, and full pods. In the F2, all possible combinations...

Using the following case, describe how you would set up a program for young boy Jonathon...

Using the following case, describe how you would set up a program for young boy Jonathon who is watching too much T.V. and not getting his homework done, by using principles from operant conditioning (behavior modification). Be sure to include all of he tasks you would use before getting started. Determine the target behavior you would seek to change. include techniques that both increase and decrease the target behavior and those behaviors closely associated with the target behavior. Jonathon is...