Topic 1

Question 1

An obsolete theory of heredity proposing that the traits of offspring are the average of parental traits

Answer 1

Blending theory

Question 2

A pattern of hereditary transmission in which individuals must be homozygous for the mutant allele of an autosomal gene in order to show the mutant phenotype

Answer 2

autosomal recessive inheritance

Question 3

Used to calculate the probability of a series of events where there are only two possible outcomes for each event.

Answer 3

Binomial probability

Question 4

Two crosses, the first between pure breeding parent that differ in two phenotypes to create an F1 generation, and then mating among the F1 to create an F2 generation

Answer 4

Dihybrid cross series

Question 5

A method for diagramming the probabilities of outcomes in a branching format

Answer 5

forked line diagram

Question 6

A group of genetically identical homozygous organisms that when self fertilized or intercrossed only produce offspring that have a phenotype identical to themselves

Answer 6

pure breeding

Question 7

the phenotype observed in a homozygous organism that is not observed in the heterozygote, and which is seen in 1/4 of the progeny from a mating between heterozygotes

Answer 7

recessive phenotype

Question 8

the cross of an organism with the dominant phenotype to an organism that is homozygous for a recessive allele

Answer 8

test cross

Question 9

a ratio or set of relative proportions between organisms with different genotypes

Answer 9

genotypic ratio

Question 10

the subfield of genetics concerned with assessment and analysis of gene transfer from parents to offspring

Answer 10

transmission genetics

Question 11

the random distribution of alleles of unlinked genes into gametes, such that all allele combinations are produced in equal proportions

Answer 11

law of independent assortment