The main way a recessive allele would be fully expressed even when only one copy is present would be .

There are no options to this question, the options are:

A) Dominance

B) Recessive inheritance

C) Incomplete dominance

D) Sex-linked inheritance

The answer is D

Explanation:

Sex-linked inheritance is a kind of non-mendelian inheritance in which traits are transferred via genes on sex chromosomes. There are two sex chromosomes in humans namely: X and Y chromosomes. These traits that are inherited this way are called Sex-linked traits.

Since the Y chromosome is genetically inert, it does not contain any trait. Hence, traits can only be transferred on the X chromosome. Therefore, once a male or female receives the affected X chromosome, the traits will be expressed irrespective of whether it is dominant or recessive. Hence, the main way a recessive allele would be fully expressed even when only one copy is present would be via SEX-LINKED INHERITANCE.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: