Question

question 6
1 pts
which of the following statements is not true?
a genotype is always expressed in the phenotype.
traits that are determined by the effect of more than one gene are known as polygenic.
most traits are under the control of more than one gene.
environmental factors can alter the effects of genes.

Explanation:

• A genotype is always expressed in the phenotype: This is false. In cases of recessive alleles, the genotype (e.g., \(Aa\) where \(a\) is recessive) may not show the phenotype of the recessive allele (\(a\)).
• Traits that are determined by the effect of more than one gene are known as polygenic: True. Polygenic traits are influenced by multiple genes.
• Most traits are under the control of more than one gene: True. Many traits like height, skin color are polygenic.
• Environmental factors can alter the effects of genes: True. For example, diet (environmental factor) can affect the expression of genes related to growth.

Answer:

A. A genotype is always expressed in the phenotype.