(a)[1]
Predict the offspring phenotypes and the phenotypic ratio for this cross.
(b)[5]
Draw a genetic diagram to account for the outcome of this cross. Use the letter B for the allele for black body colour and the letter b for the allele for yellow body colour.
(c(i))[1]
State one feature that is found in all arthropods but not in vertebrates.
(c(ii))[1]
C. caeca is a crustacean, whereas D. melanogaster is an insect. State one morphological feature of C. caeca that identifies it as a crustacean rather than an insect.
(d(i))[3]
Explain the mechanism by which the allele for albinism has become common in recent generations in populations of C. caeca.
(d(ii))[2]
State two factors that may cause mutations.