11.3 Other Patterns of Inheritance

Question 1

How many exceptions are there to Mendel’s principles? (That we learned)

Answer 1

CUATRO

Question 2

What are the CUATRO exceptions to Mendel’s principles?

Answer 2

Multiple alleles, polygenic traits, incomplete dominance, and codominance

Question 3

What are a majority of hooman traits

Answer 3

polygenic traits

Question 4

Polygenic Traits

Answer 4

Traits that are controlled by more than one gene

Question 5

What are some examples of polygenic traits?

Answer 5

fruit fly eyes, human skin color, human height

Question 6

Multiple Alleles

Answer 6

Many genes have more than two alleles

Question 7

What are some examples of traits controlled by multiple alleles?

Answer 7

A rabbit’s coat color, ABO blood typing

Question 8

Incomplete dominance

Answer 8

a cross in which the alleles are neither dominant or recessive. The heterozygous phenotype lies in between the two homozygous phenotypes. You get a blend of the 2 alleles

Question 9

What are some examples of incomplete dominance?

Answer 9

some flowers such as the 4’o’clock flower

Question 10

Codominance

Answer 10

the phenotypes produced by both alleles are clearly expressed

Question 11

What are some examples of codominance

Answer 11

Protein that controls choloesterol levels in blood, the feathers of erminette chickens (speckled black and white)

Question 12

________ _______ can affect gene expression and influence genetically determined traits

Answer 12

Environmental Conditions

Question 13

Complete dominance

Answer 13

when you are heterozygous for a trait, the dominant allele is seen in the phenotype

Question 14

What is another term for Environmental Conditions

Answer 14

epigenetic

Question 15

What are some examples of environmental conditions affecting organisms?

Answer 15

The amount of red blood cells produced, the darker pigmentation in butterfly wings

Question 16

How are butterfly wings affected by environmental conditions?

Answer 16

The pigmentation of their wings is lighter in spring because they need to absorb less sunlight and is darker in winter because they need to absorb more sunlight (to absorb heat and to dry)

Question 17

Are all traits affected by environmental conditions?

Answer 17

no

Question 18

Mendelian Inheritance

Answer 18

combination of postulates that mendel created

Question 19

What is the difference between polygenic traits and multiple alleles?

Answer 19

Multiple alleles — different forms of genes control a single gene
Polygenic traits —- multiple genes control a single trait