6F Genetics 12Q

Front

What is a dominant trait in genetics?

Back

A dominant trait is a genetic characteristic that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait in genetics?

Back

A recessive trait is a genetic characteristic that is expressed in the phenotype only when two copies of the allele are present.

Front

Define homozygous genotype.

Back

A homozygous genotype consists of two identical alleles for a particular gene, either dominant (AA) or recessive (aa).

Front

Define heterozygous genotype.

Back

A heterozygous genotype consists of two different alleles for a particular gene (Aa).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

Explain the concept of codominance.

Back

Codominance occurs when both alleles in a heterozygous genotype are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross.

Front

What is the expected phenotypic ratio from a monohybrid cross?

Back

The expected phenotypic ratio from a monohybrid cross between two heterozygous parents is 3:1.

Front

What is the expected phenotypic ratio from a dihybrid cross?

Back

The expected phenotypic ratio from a dihybrid cross between two heterozygous parents is 9:3:3:1.