Exceptions To Mendel

Question 1

What is incomplete dominance?

Answer 1

No allele is dominant, heterozygous phenotype lies somewhere between two homozygous phenotypes
Ex: red and pink flower link and makes pink flower

Question 2

What is codominance?

Answer 2

Phenotypes produced by both alleles are clearly expressed
Ex: red and white flower link and create a spotted red and white flower

Question 3

What are multiple alleles?

Answer 3

A gene with more than two alleles is said to have multiple alleles, an example is blood type

Question 4

What is sex-linked inheritance?

Answer 4

Refers to genes located on sex chromosomes

Question 5

What is XY?

Answer 5

Male

Question 6

What is XX?

Answer 6

Female

Question 7

What are polygenic traits?

Answer 7

Traits controlled by two or more genes are said to be polygenic (many genes)
-polygenic traits have wide range of phenotypes
-four genes would control this trait

Question 8

Can the environment have an impact on genes?

Answer 8

Yes it influences genetically determined traits
-the phenotype of an organism is only partly determined by its genotype