Chapter 7-Complementation

Question 1

No complementation

Answer 1

When both parents carry a mutation on the same gene. F1 generation will show mutant geneotype

Question 2

complementation

Answer 2

mutations are on different genes therefore F1 generation will not show mutant phenotype

Question 3

complementation test

Answer 3

used to determine whether two mutations that cause the same phenotype are mutations in the same gene or in different genes. Can only be used for recessive mutations

Question 4

auxotroph

Answer 4

an organism, such as a strain of bacteria, that has lost the ability to synthesis certain substances required for its growth and metabolism

Question 5

prototroph

Answer 5

a wild type cell that can grow on minimal medium alone

Question 6

Transition

Answer 6

When one purine (A or G) replaces the other purine

Question 7

Base substitution

Answer 7

When a base at a certain position in one strand of the DNA molecule is replaced by one of the other three bases

Question 8

Transversion

Answer 8

When a purine changes to a pyimidine or vice versa

Question 9

Inversion

Answer 9

A 180 degree rotation of a segment of DNA

Question 10

Translocation

Answer 10

Parts of two non homologous chromosome change places

Question 11

Deletion

Answer 11

Occurs when a block of one or more nucleotide pairs is lost from a DNA molecule

Question 12

Insertion

Answer 12

The addition of one or more nucleotide pairs

Question 13

Deamination

Answer 13

The removal of an amino acid group. Can change cytosine to uracil.

Question 14

Intercalator

Answer 14

Class of chemical mutagens composed of flat planar molecules that can sandwich themselves between successive base pairs and disrupt the machinery of replication, recombination, or repair

Question 15

Unequal crossing over

Answer 15

Change in DNA caused by erroneous recombination in which one homologous chromosome end up with a duplication while the other homologe sustains a deletion