Module 7-Genetics

Question 1

Allele

Answer 1

One of a pair of genes that occupies the same position on homologous chromosomes

Question 2

Genotype

Answer 2

Two-letter set that represents the alleles an organism possesses for a certain trait

Question 3

Phenotype

Answer 3

The observable expression of an organism’s genes

Question 4

Homozygous genotype

Answer 4

A genotype in which both alleles are identical

Question 5

Heterozygous genotype

Answer 5

A genotype with two different alleles

Question 6

Dominant allele

Answer 6

An allele that will determine phenotype if just one is present in the genotype

Question 7

Recessive allele

Answer 7

An allele that will not determine the phenotype unless the genotype is homozygous in that allele

Question 8

Carriers

Answer 8

Individuals who have one copy of an allele for a recessive trait but do not exhibit the trait

Question 9

Codominance

Answer 9

Inheritance pattern in which heterozygotes express the distinct phenotypes of both alleles

Question 10

Antigen

Answer 10

A substance that, when introduced into the blood, triggers the production of an antibody

Question 11

Antibody

Answer 11

Specialized proteins in your immune system used to attack and destroy specific antigens