Question

There are three possible genotypes and phenotypes for wing color in a species of moth: RR = red wings; Rr= orange wings; rr = yellow wings. A red winged moth is crossed with a yellow winged moth. a) What is the pattern of inheritance in this example? Explain. b) What are the genotypes and phenotypes of the parents? c) What percent of the offspring will have red wings? Orange wings? Yellow wings?

Answer 1

The inheritance pattern is Mendelian with red dominant over yellow. The genotypes of the parents are RR and rr, and all offspring will be Rr with orange wings, demonstrating incomplete dominance.

Step-by-step explanation:

The pattern of inheritance exhibited by the moth species for wing color is a simple Mendelian inheritance where the allele for red wings (R) is dominant over the allele for yellow wings (r). No information is given about the dominance of the orange wing allele (Rr), but we can assume that it is a result of incomplete dominance between the red and yellow alleles.

The genotypes of the parents are RR for the red-winged moth and rr for the yellow-winged moth. Given that red is dominant over yellow, all the offspring from this cross will have the genotype Rr and display the orange wing phenotype, assuming that orange is indeed the result of incomplete dominance between red and yellow. There will be 0% with red wings, 100% with orange wings, and 0% with yellow wings among their offspring.

Answer 2

A) I don’t understand this part (sorry)
B) The genotype for the red parent is homozygous dominant and for the yellow parent it’s homozygous recessive. The phenotype just means what color they are (which was already established)
C) The offspring will be orange (with a heterozygous gene

Hope this helped.