Question

Just answer Part B

While working with a type of beetle that is normally smooth, large, and white, you discover three mutations that lead to the recessive phenotypes bumpy, small, and grey, respectively. You cross true- breeding smooth white beetles to true-breeding bumpy grey beetles and get all smooth white F1 beetles. Then you cross the F1 beetles to true-breeding bumpy grey beetles and, after analyzing 800 F2s, calculate a map distance of 5 M between the smoothness and color loci. a) What are the four phenotypic classes you got in the F2, and about how many of each did you get? • For the body type (i.e., smooth or bumpy) use B or b to designate the alleles. • For the color (i.e., white or grey) use Gorg to designate the alleles. For the size (i.e., large or small) use LorI to designate the alleles. *In each case, use the uppercase letter for the associated with the dominant phenotype and the lower case letter for the allele associated with the recessive phenotype. b) You cross two true-breeding parents to get all F1 beetles that are large and smooth. You cross the F1 to a true-breeding small, bumpy beetles and get: 228 large and smooth, 19 small and smooth, 16 large and bumpy, 237 small and bumpy. What were the genotypes and phenotypes of the two parental beetles (P. generation)

Answer 1

Two parental genotype of the beetles are LlBb and llbb which after crossing to produce these phenotype of appearing their compulsion or repulsion ratio that these allele may be present on the same chromosomal strand or on the different strand