Category 02- Practice Questions

Front

What is codominance in genetics?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. An example is the AB blood type in humans.

Front

What are the possible phenotypes of offspring from a black angelfish and a black-lace angelfish?

Back

The expected phenotypes depend on the specific genotypes of the parents, which can include various combinations of colors based on codominance.

Front

What is the role of mRNA in protein synthesis?

Back

mRNA (messenger RNA) carries the genetic information from DNA to the ribosome, where it is translated into a specific amino acid sequence to form proteins.

Front

What is the significance of the A, B, and O alleles in human blood types?

Back

The A and B alleles are codominant to each other and dominant over the O allele, determining the blood type of an individual based on their genotype.

Front

What phenotypes can an AO and BO genotype produce in offspring?

Back

An AO and BO genotype can produce offspring with blood types A, B, AB, or O.

Front

What is a tumor?

Back

A tumor is a mass of cells that forms when cells lose their ability to regulate the cell cycle and divide uncontrollably.

Front

What is a mutation in genetics?

Back

A mutation is a change in the DNA sequence that can lead to changes in the structure and function of proteins.

Front

What are the types of mutations?

Back

The main types of mutations include deletion, insertion, substitution, and translocation.

Front

What is an insertion mutation?

Back

An insertion mutation occurs when one or more nucleotide bases are added into a DNA sequence, potentially altering the resulting protein.

Front

What is a substitution mutation?

Back

A substitution mutation occurs when one base pair in the DNA sequence is replaced by another, which may or may not affect the protein produced.