Question

Which of the following describes a Mendelian trait?

OA. Many genes control the ultimate height of a human.
O B. Three different alleles control one aspect of human blood type
C. Humans have either straight thumbs or curved thumbs.
OD. Human
D. Human eye color ranges from almost black to very light blue.

Answer 1

C. Humans have either straight thumbs or curved thumbs.

Step-by-step explanation:

Mendelian genetics is sort of black or white business (one or the other, and not really a spectrum which is why it can't account for incomplete dominance or codominance). So if straight thumb is dominant trait and curved thumb is recessive, that's how it will be seen in population.