Genotype and Phenotype Concepts

Front

What is the difference between homozygous and heterozygous?

Back

The difference is in the presence of identical (homozygous) or different (heterozygous) alleles for a particular gene.

Front

Explain the concept of homozygous with an example.

Back

Homozygous refers to having two identical alleles for a specific trait, such as AA (dominant) or aa (recessive).

Front

What does the term 'recessive' refer to in genetics?

Back

A recessive allele is one that is masked by a dominant allele and is only expressed when an organism has two copies of it (e.g., 'g').

Front

What is a homozygous dominant genotype?

Back

A homozygous dominant genotype consists of two dominant alleles, such as RR.

Front

Why is it important to understand the difference between genotype and phenotype?

Back

Understanding the difference helps in comprehending how genetic information is expressed in an organism.

Front

Define genotype.

Back

Genotype is the genetic makeup of an organism, representing the alleles it possesses.

Front

Define phenotype.

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is an example of a heterozygous genotype?

Back

An example of a heterozygous genotype is Aa, where one allele is dominant and the other is recessive.

Front

What does it mean if an organism is homozygous recessive?

Back

It means the organism has two recessive alleles for a specific trait, such as aa.

Front

What is the significance of dominant alleles in genetics?

Back

Dominant alleles can mask the expression of recessive alleles in a heterozygous genotype.