The Gene That Codes for Characteristic X Has Two Alleles

question 50

Multiple Choice

The gene that codes for characteristic X has two alleles. Allele D is dominant, and allele r is recessive. If the father is homozygous for trait X with allele r and the mother is heterozygous for trait X, the chance that one of their offspring will exhibit form r for trait X is _____.

• A) 0%
• B) 25%
• C) 50%
• D) 75%

---

Definitions:

Mnemonic Device

A memory aid or strategy that makes information easier to remember.

Proactive Interference

The tendency for older or previously learned material to impede the recall of newer material.

Serial Reproduction

A method of studying memory where information is passed and reproduced through a chain of individuals.

Recency Effect

The phenomenon where people tend to remember the last items in a series best, often observed in studies of memory and information recall.