Question

If a gene has one completely dominant allele and one recessive allele, how many different traits can these alleles produce?

a) 1
b) 2
c) 3
d) 4

Answer 1

A gene with one completely dominant allele and one recessive allele can produce two different traits.

Step-by-step explanation:

Mendel's theory stated that genes have two alleles, one dominant and one recessive. However, this is an oversimplification, as multiple alleles can exist at the population level. In the case of a gene with one completely dominant allele and one recessive allele, these alleles can produce two different traits. The dominant allele will produce a trait determined by its characteristics, while the recessive allele will produce a different trait if it is present in both copies.

For example, let's consider a gene for hair color. If the dominant allele produces black hair and the recessive allele produces blonde hair, individuals with the dominant allele will have black hair, while individuals with the recessive allele in both copies will have blonde hair. Therefore, two different traits can be produced by these alleles.