Question 1
Originally, many geneticists thought that dominant traits were caused by the presence of a gene and a recessive trait by the absence of the gene. Evaluate this idea, giving evidence for and against this proposal.
Question 2
Two heterozygous smooth-pea pea plants are crossed (
Ss X
Ss) and four peas from the cross are randomly selected for examination. The first three are smooth. Must the fourth one be wrinkled? Why or why not?