Homework SourseAlleles R and r occur at a locus that is located on the same
Alleles R and r occur at a locus that is located on the same chromosome as a locus with alleles Q and q. RrQq is crossed with rrqq, and the following progeny are produced:
RrQq 5
Rrqq 45
rrQq 45
rrqq 5
Please neatly draw the chromosomes that carry R and Q loci of the parents and progeny from this cross. Please be sure to indicate which alleles are present on each chromosome. Clearly indicate which progeny result from non-recombinant gametes and which progeny result from recombinant gametes.
Solution
Answer:
Rq/rQ X rq/rq
| rq | |
| non-recombinant gamete (Rq) | Rq/rq (45), non-recombinant progeny |
| non-recombinant gamete (rQ) | rQ/rq (45), non-recombinant progeny |
| Recombinant gamete (RQ) | RQ/rq (5), recombinant progeny |
| Recombinant gamete (rq) | rq/rq (5), recombinant progeny |
