Chapter 9

Question 1

Genes in an organism do not function in isolation but interact with each other to produce a specific phenotype

Answer 1

Gene Interaction

Question 2

gene interaction where one gene masks the expression of another gene. The gene that masks is called the epistatic gene, while the gene being masked is the hypostatic gene​

Answer 2

Epistasis

Question 3

When recessive alleles at one locus hide the expression of both dominant and recessive alleles at another locus​

Answer 3

Recessive Epistasis

Question 4

When a dominant allele at one locus masks the expression of alleles at another locus​.

Answer 4

Dominant Epistasis

Question 5

The degree or intensity with which a particular genotype is expressed in a phenotype​
.

Answer 5

Expressivity

Question 5

The percentage of individuals with a particular genotype that actually express the associated phenotype​

Answer 5

Penetrance

Question 6

When two genes interact to produce a trait that is different from either parent or any known combination of traits​

Answer 6

Novel Phenotypes

Question 7

The exchange of genetic material between homologous chromosomes during meiosis, leading to new combinations of alleles​

Answer 7

Genetic Recombination

Question 8

Genes that are located close to each other on the same chromosome and tend to be inherited together

Answer 8

Linked Genes

Question 9

The percentage of recombinant offspring produced in a genetic cross, used to measure the distance between linked genes

Answer 9

Recombinant Frequency

Question 10

The exchange of genetic material between homologous chromosomes during prophase I of meiosis​

Answer 10

Crossing Over

Question 11

Offspring whose phenotype matches one of the parental phenotypes in a genetic cross​
.

Answer 11

Parental Types

Question 12

Offspring with a combination of traits different from either parent due to recombination​

Answer 12

Non-Parental (Recombinant) Types

Question 13

A unit of measure for the distance between genes on a chromosome. One map unit corresponds to a 1% recombination frequency​

Answer 13

Map Unit (Centimorgan)

Question 14

A diagram showing the relative positions of genes on a chromosome based on recombination frequency​

Answer 14

Genetic Map

Question 14

The phenomenon where the occurrence of one crossover reduces the probability of another crossover nearby

Answer 14

Interference

Question 15

The ratio between the observed and expected frequency of double crossovers​

Answer 15

Coefficient of Coincidence