11.1 Study Guide

Question 1

Definition of Genotype:

Answer 1

An individual’s allele combination/ genetic traits

Question 2

Definition of Homozygous:

Answer 2

Genotypes with the same allele

Question 3

Definition of Heterozygous:

Answer 3

Genotypes with two different alleles

Question 4

Definition of Phenotype

Answer 4

The visible trait that the alleles cause / physical traits

Question 5

Example of Genotypic ratio:

Answer 5

4:0, 2:2, 0:4, 1:2:1

Question 6

Example of Phenotypic ratio:

Answer 6

4:0, 0:4, 3:1, 2:2

Question 7

Definition of dominant alleles:

Answer 7

It takes one T(example) allele to make a protein that causes the phenotype, no matter what the other allele is.

Question 8

Example of dominant alleles:

Answer 8

TT, Tt

Question 9

Definition of recessive alleles:

Answer 9

It takes two t(example) alleles to cause the phenotype.

Question 10

Example of recessive alleles:

Answer 10

tt

Question 11

Definition of Codominance:

Answer 11

Both of an individual’s alleles are visible in its phenotype

Question 12

What ratios did Mendel consistently see in the F1 and F2?

Answer 12

F1
4:0 –> True-breeding purple-flower peas : True-breeding white-flower
F2
3:1 –> True-breeding purple-flower peas : True-breeding white-flower