Exam 3

Question 1

Codominace

Answer 1

The phenotype of two alleles is observed in the heterozygote

Question 2

Incomplete dominance

Answer 2

An intermediate phenotype is observed the pink in the flowers.

Question 3

Lethal phenotypes

Answer 3

Mendaline ratios with lethal alleles

Question 4

Epistasis

Answer 4

Describes interactions between two or more genes

Question 5

Pleiotropy

Answer 5

A single gene having multiple effects on individuals phenotype

Question 6

Penetrace

Answer 6

Not every individual with mutant genotype displays mutant phenotype

Question 7

Expressivity

Answer 7

The degree to which a phenotype is expressed

Question 8

Genome wide association study (GWAS)

Answer 8

Identify regions of chromosomes that are likely to contain gene association with trait but NOT identify a specific causative gene.

Question 9

Horizontal gene transfer

Answer 9

Individuals in the same generation can exchange DNA through other mechanisms (present in bacteria only)

Question 10

Three types of horizontal gene transfer

Answer 10

1. Conjugation
2. Transformation
3. Transduction

Question 11

Conjugation

Answer 11

Transfer of DNA from one cell to another through direct cell contact

Question 12

Transformation

Answer 12

Direct uptake of DNA molecules by a cell.

Question 13

Transduction

Answer 13

Donor is bacteria not a virus but facilitates the process