1) An individual is heterozygous for 3 genes (A/a B/b and C/c). He is crossed to an individual that is homozygous recessive for the same 3 genes (a/a b/b and c/c). The following offspring were seen. Which of the following phenotypes represent a double crossover event? (Hint - are you seeing all of the phenotypes in the next generation that you expected to see?) Select all that apply.
Phenotype Number +++
154
+b+
322
a+c
318
abc
148
++c
76
ab+
82
2) Use the same information in the question above. What is the gene order?
The gene order is B-C-A
The gene order is A-B-C
The gene order is B-A-C
3) Using the same information as in the previous problem, What is the recombination frequency between each gene pair? Round your answer to 2 decimal places. For example, report 12.2345% as 0.12.
recombination frequency between A/B =
recombination frequency between A/C =
recombination frequency between B/C =
******According to the hint, we don't see two phenotypes that we are expecting which are +bc, and a++. Are those the ones that represent double crossovers, and if so, how do we calculate the recombination frequency between each gene? Would very much appreciate some help.
1) An individual is heterozygous for 3 genes (A/a B/b and C/c). He is crossed to an individual that is homozygous recessive for the same 3 genes (a/a b/b and c/c). The following offspring were seen. Which of the following phenotypes represent a double crossover event? (Hint - are you seeing all of the phenotypes in the next generation that you expected to see?) Select all that apply.
| Phenotype | Number |
| +++ | 154 |
| +b+ | 322 |
| a+c | 318 |
| abc | 148 |
| ++c | 76 |
| ab+ | 82 |
2) Use the same information in the question above. What is the gene order?
| The gene order is B-C-A | ||
| The gene order is A-B-C | ||
| The gene order is B-A-C |
3) Using the same information as in the previous problem, What is the recombination frequency between each gene pair? Round your answer to 2 decimal places. For example, report 12.2345% as 0.12.
recombination frequency between A/B =
recombination frequency between A/C =
recombination frequency between B/C =
******According to the hint, we don't see two phenotypes that we are expecting which are +bc, and a++. Are those the ones that represent double crossovers, and if so, how do we calculate the recombination frequency between each gene? Would very much appreciate some help.
