Which statement best describes the relationship between an allele and a gene? A
An allele is a variation of a gene that can be expressed as a phenotype.

B
An allele is a segment of a DNA molecule that controls replication of a gene.

C
An allele is the primary protein made by a gene found in a developing embryo.

D
An allele is the part of a gene that attaches to messenger RNA molecules.

Which of the following is a common danger of commercial fishing?

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.