Question

which of the following statements is not true? a.a genotype is always expressed in the phenotype. b.environmental factors can alter the effects of genes. c.traits that are determined by the effect of more than one gene are known as polygenic. d.most traits are under the control of more than one gene.

Answer 1

Answer: A. a genotype is always expressed in the phenotype.

Step-by-step explanation:

A genotype is not always expressed in the phenotype.

The genotype is an organism's genetic information, whereas a phenotype is the set of observable physical traits.

One example of this is a purple flower.

Suppose that the genotype of a flower is Bb (heterozygous). The phenotype would be the trait observed, in this case, it's the color. The phenotype would be "purple".

If I just gave you the phenotype "purple", you wouldn't be able to know the genotype because there are two possible answers; BB and Bbm which would both lead to a purple-colored flower.

Therefore, the correct answer is A.

Hope this helped!