All About Genetics

Front

What is the genotype of a Labrador retriever that can produce both chocolate and yellow puppies?

Back

Bb

Front

What does it mean if a trait is X-linked?

Back

It means the gene for the trait is located on the X chromosome.

Front

What is the phenotype of an individual with the genotype 'bb'?

Back

The phenotype is a chocolate-colored Labrador retriever.

Front

What is codominance in genetics?

Back

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

Front

What is the significance of the ABO blood group system?

Back

It demonstrates multiple alleles and codominance, with A and B alleles being codominant and O being recessive.

Front

How many alleles does an individual inherit for a given trait?

Back

An individual inherits two alleles for each trait, one from each parent.

Front

What is the genotype of an individual with type O blood?

Back

The genotype is 'ii'.

Front

What is the expected genotype ratio in a monohybrid cross?

Back

1:2:1 (homozygous dominant : heterozygous : homozygous recessive).

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is the role of meiosis in genetics?

Back

Meiosis is the process that produces gametes, reducing the chromosome number by half and ensuring genetic diversity.