Question: A bacterium with genotype A+B-C-was transduced by a particle carrying the linked genes A-B+C+, and A+B+C+ recombinants were selected. The reciprocal cross was also performed. The number of A+B+C+ recombinants was the same in both the first cross and the reciprocal cross. What information does this give you about the order of the three genes? (please explain in as much details)- these genes are assumed as any random genes
Question: A bacterium with genotype A+B-C-was transduced by a particle carrying the linked genes A-B+C+, and...
A bacterium with genotype A+B-C-was transduced by a particle carrying the linked genes A-B+C+, and A+B+C+ recombinants were selected. The reciprocal cross was also performed. The number of A+B+C+ recombinants was the same in both the first cross and the reciprocal cross. What information does this give you about the order of the three genes?
In a transductional cross between an A+B+C+ genotype donor and an A-B-C- recipient, 100 A+ recombinants were selected. Of those, 15% were also B+, while 75% were C+. Which gene is closer to gene A on the chromosome, gene B or gene C?
You are following 4 genes (A, B, C, D) on the same chromosome. The genotype of a heterozygote, displaying the correct gene order, is shown below. ABCD/abcd Compared to the heterozygote above, what has happened in the following: ABCBCD/abcd Answer 1Choose...Duplication of a chromosomal region/Inversion of a chromosomal region/Translocation of a chromosomal region/Reciprocal translocation/Deletion of a chromosomal region ABCABCD/abcd Answer 2Choose...Duplication of a chromosomal region/Inversion of a chromosomal region/Translocation of a chromosomal region/Reciprocal translocation/Deletion of a chromosomal region ABCD/adcb Answer...
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...
43. Genes a and b are X-linked and are located 7 mu apart on the X chromosome of Drosophila. A female of genotype a+ b/a b+ is mated with a wild-type (a+b+/Y). a. What is the probability that one of her sons will be either a+b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+b+ in phenotype? 44. Three recessive autosomal mutations in Drosophila: a versus wild-type A. b versus B,...
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the same chromosome. The frequency of recombination between b---c is 0.276. How many recombinant offspring would be expected if 2000 progeny were produced from a testcross between a female heterozygous for both genes and a homozygous recessive male?
Three plant genes, A, B, and C, are linked and occur in the following order. Genetic distances are given as map units (m.u.): A________10 m.u.______B_____0 m.u.__C The genes underlie the following phenotypes: A/_ = blue flowers, a/a = white flowers B/_ = tall stems, b/b = short stems C/_ = green leaves, c/c = red leaves You cross two individuals with the following genotypes: AbC/AbC x aBc/aBc If you self the resulting F1 the proportion of the offspring that will...
Genes ‘‘a’’ and ‘’b’’ are linked with a recombination frequency of 10%. “A” is completely dominant over ‘’a’’ and ‘’B’’ is completely dominant of ‘’b’’. Assuming you start with the following parental genotypes AAbb and aaBB in a dihybrid cross Indicate the percentage of F2 progeny following an F1 self-cross that have: only parental types, both parental and recombinant types and only recombinant types. a. 90%, 10% 0% b. 45%, 45%, 10% c. 85%, 10%, 5% d. 81%, 18%, 1%...
You are following the inheritance of three genes: A, B and C. A and B are on the same chromosome; C is on a different chromosome from A and B (for example; A and B are on chromosome 1 and C is on chromosome 4).Which option correctly represents the genotype of an individual who is heterozygous for all three genes?What is the recombination frequency for unlinked genes (i.e., genes that sort independently)? Frequency is given as a number from 0...
For Drosophila, let’s consider three genes a, b, and c. We know where a and b are located, and have a nice idea about c. You conduct a three-point cross to figure it out for sure. We’ll use a, b, & c to refer to the three mutants, and + to refer to the wild-types. Here are the progeny counts from a heterozygote by homozygous mutant wild-type: a, b, c: 770 +, +, +: 384 a, +, +: 80 +,...