A 3-point test cross produces the following numbers of offspring: + + a 348 How many double recombinant offspring are there? g x + 363 + X + 88 O 1 g + a 96 g + + 61 O 711 + X a 40 O 285 g x a 1 + + + 3

Consider the following Test Cross results & chromosome map: Test Cross Progeny 525 A   B  C 500 A+ B+C+ 456 A+ B C 308 A  B+C+ 101 A  B  C+ 100 A+ B+C 2 A+ B C+ 1 A  B+C Total Progeny = 1993   1-Based on the above data calculate the expectednumber of Double crossovers (DCOs)? Round answers to the closest whole number.

Locus A has two alleles (A and a) while locus B has two alleles (B and b). The recombination frequency between locus A and locus B is 17%.  A F1 heterozygote in trans-configuration is mated with an aabb individual. What are the expected phenotypic percentages in the resulting progeny? Round your percentages to the nearest tenths and in the following format, replacing the "0.0" with your percentages:

Find the correct order of the genes on the chromosome

In 1-2 sentences and in your own words, define the term recombination.

The image shows a pair of homologous chromosomes from a single parent before gamete production. M1 and M2 are maternal chromosomes, while P1 and P2 are paternal chromosomes. Two traits are shown: D represents seed color (D – green, d – yellow), while F represents flower color (F – purple, f – white). These two traits follow the patterns of basic Mendelian genetics. During crossing-over between the M2 F allele and the P1 f allele, a mutation occurred and the portion of P1 did not reattach to the chromosome. Which of the following explains what would happen to the proportion of white flowers in a population resulting from this mutation? A - There would be an increase in the proportion of white flowers because the f allele is distributed to more gametes. B - There would be a decrease in the proportion of white flowers because the f allele is not distributed to as many gametes. C - There would be an increase in the proportion of white flowers because the f allele would not be masked by the…

Consider the following Test Cross results & chromosome map:    Test Cross Progeny 525 A   B  C 500 A+ B+C+ 456 A+ B C 308 A  B+C+ 101 A  B  C+ 100 A+ B+C 2 A+ B C+ 1 A  B+C Total Progeny = 1993   1-Calculate the interference.?

The order of the genes on a plant chromosome is A, B, C, where A and B are located 10 cM apart and B and C are located 3 cM apart. What is the probability that the trihybrid ABC/abc will produce any kind of recombinant gamete?

Consider the following cross: AaBbCcDdEe X AaBbCcDdEe. How many different phenotypes would you expect in the offspring from this cross? Number of phenotypes =

The rate of crossing over between two linked genes (r and w) is 0.44. The following cross is carried out: Rr Ww × rr ww. What proportion of the gametes of the Rr Ww parent were recombinant gametes? Explain your reasoning and state any assumptions you made.