Genetics Terms 2.0

Question 1

Homozygous

Answer 1

Having identical alleles for a single trait.

Question 2

Dominant

Answer 2

The allele that is expressed no matter what the other allele is.

Question 3

Heterozygous

Answer 3

When one of the alleles is dominant and the other allele is recessive

Question 4

Recessive

Answer 4

The allele that is not expressed when two different alleles are present. This trait will only be expressed when 2 such alleles are present.

Question 5

Heredity

Answer 5

The passing down of physical characteristics or traits from one
generation to another. This ensures that the offspring have characteristics of the parent, but are not carbon copies.

Question 6

Phenotype

Answer 6

A visible or measurable trait that is passed on and expressed in offspring. For example a person’s eye colour, hair colour, height, nose shape, skin colour, and all other physical features.

Question 7

Genotype

Answer 7

All of the genetic information passed on to the offspring whether it is
expressed or hidden.

Question 8

Mutagen

Answer 8

Agents that can make changes in the DNA of an organism.

Question 9

Allele

Answer 9

One of the alternative forms of a gene. In most organisms there are 2
for any one gene (one from each parent), which occupy the same
position on homologous chromosomes. They can either be the same or they can be different.