Mendel Accounted for the Observation That Traits That Had Disappeared

question 58

Multiple Choice

Mendel accounted for the observation that traits that had disappeared in the F1 generation reappeared in the F2 generation by proposing that

• A) new mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1.
• B) the mechanism controlling the appearance of traits was different between the F1 and the F2 plants.
• C) traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1.
• D) the traits were lost in the F1 due to dominance of the parental traits.
• E) members of the F1 generation had only one allele for each trait, but members of the F2 had two alleles for each trait.

---

Definitions:

Hyponychium

The area of epidermis beneath the free edge of the nail plate, forming a barrier to protect the nail bed.

Nail Root

The part of the nail located under the skin behind the fingernail or toenail, from which the nail grows.

Soft Keratin

A type of keratin that is more flexible and found in the epidermis of the skin, providing protection and moisture retention.

Digits

Fingers or toes in humans and other species, also used to describe numerical digits in mathematics and technology.