Question

Epistasis is a phenomenon in which one gene controls the expression of another. In one case,...

Epistasis is a phenomenon in which one gene controls the expression of another. In one case, a dihybrid cross should yield a 9:3:4 ratio. You collect the following data on mice: black coat: 70 brown coat: 24 white coat: 26 Is there any reason to doubt the ratio of 9 black : 3 brown : 4 white?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

here null hypothesis:Ho: collected data follows ratio of 9 black : 3 brown : 4 white

Alternate hypothesis:Ha: collected data does not follows ratio of 9 black : 3 brown : 4 white

degree of freedom =categories-1= 2
for 0.05 level and 2 degree of freedom :rejection region = 5.991

applying chi square goodness of fit test:  

observed Expected Chi square
category Probability(p) Oi Ei=total*p R2i=(Oi-Ei)2/Ei
black    9/16 70.000 67.500 0.093
brown    3/16 24.000 22.500 0.100
white    1/4 26.000 30.000 0.533
total 1.000 120 120 0.7259

Decision: as test statitic is not in rejection region we fail to reject null hypothesis

Conclusion:we do not have sufficient evidence to conclude that there is a differnce in data collected from  ratio of 9 black : 3 brown : 4 white

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In cats, assume that one gene controls the color of pigment produced during fur growth, and...
In cats, assume that one gene controls the color of pigment produced during fur growth, and comes in black and orange alleles. Separately, another gene controls whether any pigment produced is actually deposited in a growing hair or not. Thus, any cat homozygous for the recessive allele of the pigment deposition gene will have white fur, regardless of which combination of black or orange alleles they have for the other gene. What kind of inheritance is this an example of?...
1. Consider two genes in the rabbit. Allele C is dominant and produces rabbits with full...
1. Consider two genes in the rabbit. Allele C is dominant and produces rabbits with full color. The recessive allele c produces albino rabbits. The second gene controls the color of the fat. Allele Y produces rabbits with white fat and the recessive allele y produces yellow fat. A series of 2-point test crosses with a dihybrid rabbit produced the following progeny: albino with white fat, 22; full color with white fat, 3; albino with yellow fat, 4; full color...
1) One parent has yellow flowers, which is the dominant allele Y. The second parent has...
1) One parent has yellow flowers, which is the dominant allele Y. The second parent has white flowers, the recessive allele y. If the offspring are all yellow, what is the genotype of each parent? 2) A plant is homozygous for the recessive gene "a" causing the plant to be short. What is the genotype and the phenotype of this plant? (In your answer, be very clear about which is the genotype and which is the phenotype). 3) The allele...
For problem 1, to compute probabilities, the probability of event 1 AND event 2 is obtained...
For problem 1, to compute probabilities, the probability of event 1 AND event 2 is obtained by multiplying the two probabilities together, whereas the probability of event 1 OR event 2 is obtained by adding the two probabilities. 1.​Duchenne muscular dystrophy (DMD) is a condition that causes muscle degeneration and then death. Most people with the condition are wheelchair-bound by age 12 and dead before age 30. ​The condition is due to a mutation in the gene for a protein,...
For problem 1, to compute probabilities, the probability of event 1 AND event 2 is obtained...
For problem 1, to compute probabilities, the probability of event 1 AND event 2 is obtained by multiplying the two probabilities together, whereas the probability of event 1 OR event 2 is obtained by adding the two probabilities. 1. Duchenne muscular dystrophy (DMD) is a condition that causes muscle degeneration and then death. Most people with the condition are wheelchair-bound by age 12 and dead before age 30. The condition is due to a mutation in the gene for a...
1) In cattle, there is no dominance between the alleles for red coat (W) and white...
1) In cattle, there is no dominance between the alleles for red coat (W) and white coat (c). The heterozygote is intermediate or "roan" in color. a) Give the genotypic and phenotypic ratios to be expected following a mating between two roan animals. b) What are the expected genotypic and phenotypic ratios from a cross between a roan animal and a white one? 2) In cattle, the hornless condition (H) is dominant to that for the possession of horns (h)....
Using the pivot table that you just created, determine which of the color types sold the...
Using the pivot table that you just created, determine which of the color types sold the least amount of yards using =MIN() Using the pivot table that you just created, determine which of the color types sold the largest amount of yards using =MAX() If Saeko wants to expand the colors in both the best selling and the worst selling color type, which two color types should she buy? Least amount sold: 5194 Largest amount sold: 7229 What colors should...
1. A species of flowering plant includes plants with blooms that range from bright golden yellow...
1. A species of flowering plant includes plants with blooms that range from bright golden yellow to very pale yellow; no flowers carrying the yellow pigment allele appear white. The allele for yellow flower color: a. must be a suppressor of another allele. b. demonstrates incomplete penetrance. c. demonstrates variable expressivity. d. must be a modifier of another allele. e. demonstrates variable penetrance. 2. Coat color in mice is determined by two alleles acting at a single locus: B is...
1 One form of Retinitis Pigmentosa is a Y- linked genetically inherited disease of the eye...
1 One form of Retinitis Pigmentosa is a Y- linked genetically inherited disease of the eye in which the cells of the retina produce defective. Symptoms include a progressive loss of sight starting with decreased night vision, loss of peripheral vision, and eventually blindness. If a father has the disease and a woman who does not, have a son what are the chances their son will also have the disease? A) not enough information B) 25% C) 0% D) 50%...
1.Which of the following is TRUE? a) Genetics is about the genotype. b)Inheritance is controlled by...
1.Which of the following is TRUE? a) Genetics is about the genotype. b)Inheritance is controlled by factors and each offspring receives three factors from each parent. c)Allele pairs never segregate from one another. d)The principle of segregation states that genes for different traits assort independently of one another in the formation of gametes. e)Independent assortment of two traits shows a F2 generation that has a 9:3:3:1 phenotypic ratio. 2.A cross between a black rabbit (BB) and a white rabbit (bb)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT