Question

Which of the following was not one of Mendel's conclusions based on his monohybrid crosses?

1) The inheritance of traits is determined by discrete units called genes.
2) Each individual inherits two copies of each gene, one from each parent.
3) The presence of a dominant allele always results in the expression of the corresponding trait.
4) The presence of a recessive allele can be masked by the presence of a dominant allele.

Answer 1

Mendel did not conclude that the presence of a dominant allele always results in the expression of the corresponding trait. Option 3 is correct.

Step-by-step explanation:

Mendel's conclusion that was not based on his monohybrid crosses was that the presence of a dominant allele always results in the expression of the corresponding trait. However, Mendel did not conclude that the presence of a dominant allele always results in the expression of the corresponding trait. This is because Mendel's laws have been expanded upon and we now understand that there are not just simple dominant-recessive relationships - other factors and types of inheritance can influence trait expression.

In his experiments with pea plants, Mendel discovered that traits were determined by discrete units called genes, which are inherited in pairs from each parent. He also found that the presence of a recessive allele can be masked by the presence of a dominant allele, resulting in the dominant trait being expressed. However, he did not conclude that the presence of a dominant allele always leads to the expression of the corresponding trait.