A researcher is trying to assess whether or not two genes (G and Q) that determine...

A researcher is trying to assess whether or not two genes (G and Q) that determine coat color (brown-dominant or white-recessive) and hair length (short -dominant or long-recessive) in hamsters are linked. Describe the crosses they should perform to test for linkage and how the results from these crosses would answer their research question.

Solutions

Expert Solution

Answer:

Dihybrid testcross is used to know whether the two genes are linked or not.

If testcross ratio is 1:1:1:1, it indicates that the two genes are not linked and they are assorted independently.

Ex:

Brown, short (BBSS) x white, long (bbss)---Parents

BbSs (brown, short)----------------------------F1

BbSs (F1) x bbss (tester parent)—Testcross

	bs
BS	BbSs (brown, short)-25%
Bs	Bbss (brown, long)-25%
bS	bbSs (white, short)-25%
bs	bbss (white, long)-25%

----

If testcross progeny do not fit into the 1:1:1:1 ratio and recombinant progeny are produced in less number than the non-recombinant progeny. It indicates that the two genes are linked.

Ex:

Brown, short (BBSS) x white, long (bbss)---Parents

BbSs (brown, short)----------------------------F1

BbSs (F1) x bbss (tester parent)—Testcross

	bs
BS	BbSs (brown, short)-more than 25% (non-recombinant)
Bs	Bbss (brown, long)-less than 25% (recombinant)
bS	bbSs (white, short)-less than 25% (recombinant)
bs	bbss (white, long)-more than 25% (non-recombinant)

gladiator answered 1 year ago

Next > < Previous

Related Solutions

Suppose two genes determine shape and color of peas. Gene G codes for color and G...

Suppose two genes determine shape and color of peas. Gene G codes for color and G is dominant. A pea that is GG or Gg is green, a pea that is gg is yellow. The gene R codes for shape. A pea that is RR or Rr is round, a pea that is rr is oval. If we cross two peas that are Gg and Rr we expect the following distribution of peas: (9/16) are green and round, (3/16) are...

When trying to determine probabilities, one must first assess whether the variable would have a normal...

When trying to determine probabilities, one must first assess whether the variable would have a normal distribution. Using the tools from this course, what are some methods that could be used to determine whether a variable has a normal distribution?

When trying to determine probabilities, one must first assess whether the variable would have a normal...

A researcher is trying to determine the relationship between heights and weights of individuals. Which of...

A researcher is trying to determine the relationship between heights and weights of individuals. Which of the following statistical tools would be most appropriate to aid in this study? none of the other answers are correct a box plot the least-squares regression line a joint frequency table a pie chart

TWO MEANS A researcher wishes to determine whether people with high blood pressure can reduce their...

TWO MEANS A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. Use the sample data below to test the claim that those who followed the diet have a lower mean blood pressure than those who did not followed the diet. Followed the diet: n1 = 85, x ̅_1 = 189.1 s1 = 38.7 Did not follow the diet: n2 = 75, x ̅_2 = 203.7 s2 = 39.2...

An analyst is trying to determine whether the prices of certain stocks on the NASDAQ are...

An analyst is trying to determine whether the prices of certain stocks on the NASDAQ are independent of the industry to which they belong. She examines four industries and classifies the stock prices in these industries into one of three categories (high-priced, average-priced, low-priced). - Provide the competing hypotheses to determine whether stock price depends on the industry. - Use Minitab to calculate the value of the test statistic and approximate the p-value. - At a 1% significance level, what...

A researcher wants to determine whether there is a difference in the average age of elementary...

A researcher wants to determine whether there is a difference in the average age of elementary school, high school, and community college teachers. Teachers are randomly selected. Their ages are recorded below. Can you reject the claim that there is no difference in the average age of each group? Use 5% level of significance. Elementary Teachers High School Teachers CC Teachers 24 37 45 28 42 36 25 39 39 52 48 61 36 43 35 22 32 45 a)...

The state of New Jersey is trying to determine whether to add a train line or...

The state of New Jersey is trying to determine whether to add a train line or not, given the new reality of social distancing.Using a selected sample of every fourth person emerging from the PATH train at Newark’s Penn Station, they were only able to find ten people for their sample.Each person was asked how many miles they would drive to work each week, if the trains did not allow for safe social distancing. The answers were: 150 750 300...

You are trying to design a system that will determine whether someone has a PhD in...

You are trying to design a system that will determine whether someone has a PhD in music. You have the following information: The probability that a music PhD can correctly identify a composer from a 5-second audio clip is 85% The probability that anyone else can identify a composer from a 5-second audio clip is 2% Music PhDs make up 0.3% of the population You stop someone on the street and play them a 5-second segment of Claire de Lune....

What 3 factors are considered, in trying to determine whether there is a need for additional...

What 3 factors are considered, in trying to determine whether there is a need for additional detailed test of controls?

Subjects