Discussion:
Gamete distribution and offsprings from select matings
1) Consider a genetic locus that could hold either of the alleles P or p (where P is dominant, p is recessive). Consider a second genetic locus (for some other unrelated trait) that could hold either of the alleles R or r. Listed below are some genotypes of individuals for each of these loci:
a) PPRR
b) PpRR
c) ppRr
d) PpRr
For each of these genotypes, assume that the two loci assort independently of each other (2nd law). Figure out what different kinds of gametes they could form.
2) Consider again the loci Pp and Rr. Individuals with the following genotypes are mated to each other:
a) PpRR X PPRr
b) PpRr X pprr
c) PPRR X ppRR
d) PpRr X PpRr
Assume again, that P alleles assort independently of R alleles. Figure out what all possible genotypes are for the offspring of each mating, and at what frequency each of the genotypes would appear among the offspring. (ex: PPrr is 1/16 of offspring)
Submit your responses using the following format:
Question-1
a) (list gametes on one line with commas)
b) (as above)
c) (as above)
d) (as above)
Question-2
a) genotype #1, frequency
genotype #2, frequency
etc.
b) as above
c) as above
d) as above