Exam 2 Part 4

Question 1

When was Mendel’s work rediscovered?

Answer 1

1900

Question 2

Presence of two or more different phenotypes for particular gene in a population

Answer 2

Polymorphism

Question 3

Most genes in the human genome have more than ___ alleles

Answer 3

2

Question 4

Every individual can and must have only __ alleles for a particular gene. One inherited from mom and another from dad

Answer 4

2

Question 5

Neither version of the gene (allele) dominate each other

Answer 5

Codominance

Question 6

True or false: If someone has a codominant allele it will be expressed

Answer 6

True

Question 7

What strongly influences the expression of genes?

Answer 7

The environment

Question 8

Traits determined by genes at tow or more loci, often difficult or impossible to identify all genes involved; many genes contribute to a single effect

Answer 8

Polygenic traits

Question 9

What are some examples of polygenic traits?

Answer 9

Height, skin color, hair color, eyeshade, head form

Question 10

A single gene affects more than one phenotypic trait

Answer 10

Pleiotropy

Question 11

Most traits are ____ and _____

Answer 11

Polygenic and pleiotropic

Question 12

More than 1 gene contributes to the phenotype and their expression is affected by the environment; this produces traits with a continuous distribution

Answer 12

Complex inheritance

Question 13

What does DNA stand for?

Answer 13

Deoxyribonucleic acid

Question 14

Portion of DNA that is read and turned into protein

Answer 14

Gene

Question 15

What are the 4 bases of DNA?

Answer 15

Adenine, thymine, cytosine, guanine