Given that the recombination frequency between the alleles is 0.2. It means that frequecny of recombinant alleles will be 0.2 and parental gametes will be 0.8

probability of the cross giving progeny of the genotype ab/ab will be - frequency of ab gamete from AB/ab x frequency of ab gamete aB/Ab = 0.1*0.4 = 0.04.
So, probability of the cross giving progeny of the genotype ab/ab = 0.04.
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2. Genes A and B are linked on the same chromosome. The recombination frequency between the...
Question 2 Genes a and b are linked, with 20% recombination frequency. Two pure breeding strains (the parental cross) were crossed. The F1 was then testcrossed. a+b-/a-b+ x a-b-/a-b- What were the parental strains genotypes? b. What would be the genotypes and the probability of each, among progeny of the testcross? Example: a+b+/a-b- 45% c. Is this an example of cis- or trans-linkage?
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
Genes A and B are located on the same chromosome 10 centimorgans apart. What is the likelihood of AB/ab progeny in a cross between Ab/aB and ab/ab individuals? a. 1/20 b. 1/10 c. 1/4 d. 9/20 e. 9/10
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a hallmark of independent assortment. Genes that are located close together on the same chromosome have a recombination frequency less than 50%, which is an indication of linkage. Complete the following questions to investigate recombination frequency between genes that are far apart on the same chromosome. Two genes on the same chromosome may have no crossover (NCO), a single crossover (SCO), or a double crossover...
Suppose the A and B genes are on the same chromosome but separated by 100 map units. What fraction of the progeny from the cross AB/ab x ab/ab would be AB/ab?
1. A,B and C are linked genes. Recombination between A and B is 10%; between A and C IS 7%; AND BETWEEN B AND C IS 17%. What is the order of these genes on chromosome?
The genes A, B, and C are tightly linked to each other on the same chromosome. The genes are 2 map units away from each other. A-B=2 map units, B-C=2 map units, and A-C= 4 map units. You cross an organism that AABBCC to one that is aabbcc. You take the F1 heterozygote and cross it to aabbcc. How many offspring should you screen to observe the rare event (a double crossover progeny?) 1 – (probability of not getting rare...
QUESTION 3 Two genes on the same chromosome exhibit a recombination rate r of 0.3. What can be said about the linkage of these two genes? They are physically linked They are genetically linked They are unlinked They are both physically and genetically linked.
Genes A and B are linked, with 20 percent recombination. What would be the phenotypes, and the probability of each, among progeny of the following cross? A B/abxa b/ab Parentals are Aband a B and you expect 45% of each, recombinants are AB and a b with 5% of each Parentals are AB and a b and you expect 45% of each, recombinants are Ab and a B with 5% of each Parentals are A B and a b and...
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Which statement explains why the recombination frequency between two genes is always less than 50%? Recombination cannot be more than 50% because chromosomes are only 50 map units in length. The genotype of the F, gametes will always be 50% parental gametes and 50% recombinant gametes. Genes with a recombination frequency near 50% are unlinked and have an equal likelihood of being inherited together or separately. F1 gametes always have 50% of their alleles from each parental...