8.1 Study Guide

Question 1

Genotype

Answer 1

Genetic Makeup

Question 2

Homozygous

Answer 2

Having inherited the same versions of genes ex: RR

Question 3

Heterozygous

Answer 3

Having different gene ex: Rr

Question 4

Phenotype

Answer 4

physical makeup

Question 5

Genotypic ratio

Answer 5

ratio of genotype

Question 6

Phenotypic ratio

Answer 6

ratio of phenotype

Question 7

Dominant

Answer 7

passes down and over rules other recessive gene

Question 8

Recessive

Answer 8

does not get passed down

Question 9

co-dominance

Answer 9

two versions (alleles) of the same gene are expressed separately to yield different traits in an individual.

Question 10

Explain how a test cross works

Answer 10

The organism in question is crossed with an organism that is homozygous for the recessive trait, and the offspring of the test cross are examined.