Multiple Choice
In fundamental genetics, what do we call the observable result of an organism's genotype (often influenced by the environment)?
31
views
1. Introduction to Genetics
Fundamentals of Genetics
Multiple Choice
In classical Mendelian genetics, which of the following represents a genotype?
A
50% round : 50% wrinkled
B
Round seeds
C
A
D
Aa
Verified step by step guidance1
Understand the difference between phenotype and genotype: Phenotype refers to the observable traits (like round or wrinkled seeds), while genotype refers to the genetic makeup (the alleles an organism carries).
Identify the options given: '50% round : 50% wrinkled' describes a ratio of phenotypes, 'Round seeds' is a phenotype description, 'A' is a single allele, and 'Aa' is a combination of two alleles representing a genotype.
Recall that a genotype consists of two alleles (one from each parent) for a particular gene in diploid organisms, such as 'Aa' or 'AA' or 'aa'.
Recognize that 'Aa' represents a heterozygous genotype, which is a valid genotype notation showing the presence of two different alleles.
Conclude that among the options, 'Aa' correctly represents a genotype because it specifies the genetic composition rather than just the trait or allele alone.
Related Videos
Related Practice
