Genetics

Question 1

Gene

Answer 1

The basic unit of heredity passed from parent to child;
A gene is a portion of DNA that determines a certain trait.

Question 2

Alleles

Answer 2

An allele is a specific form of a gene. Alleles are responsible for the variations in which a given trait can be expressed

Question 3

Dominant Alleles

Answer 3

requires that only one of the two alleles be present to express the trait.

Question 4

Recessive Alleles

Answer 4

A recessive allele does not produce a trait at all when only one copy is present.

Question 5

Phenotype

Answer 5

Phenotype refers to an individual’s observable traits, such as height, eye color and blood type.

Question 6

Genotype

Answer 6

the genetic makeup of an organism

Question 7

Homozygous Dominant

Answer 7

The definition of homozygous dominant is a genotype where an individual inherits two copies of a dominant gene (BB)

Question 8

Heterozygous

Answer 8

If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. (Bb)

Question 9

Homozygous recessive

Answer 9

when an organism carries two copies of the same recessive allele (bb)