Punnett Squares

Question 1

Dominant

Accepted Answer

Capital letter, overrides recessive

Question 2

Recessive

Accepted Answer

Lowercase letter, only works when homozygous

Question 3

Heterozygous

Accepted Answer

One capital one lower / 2 different letters

Question 4

Homozygous recessive

Accepted Answer

Two lowercase / recessive letters

Question 5

Homozygous dominant

Accepted Answer

Two uppercase / dominant letters

Question 6

Codominance

Accepted Answer

Both alleles are expressed equally in the phenotype (AB)

Question 7

Incomplete dominance

Accepted Answer

Heterozygous phenotype is between two homozygous phenotypes. (Red x White = Pink)

Question 8

Multiple alleles

Accepted Answer

More than two alleles for gene in a population.

Question 9

Alleles

Accepted Answer

Different versions of a gene

Question 10

Phenotype

Accepted Answer

Observable characteristics of an organism

Question 11

Genotype

Accepted Answer

Genetic makeup of an organism

Question 12

Trait

Accepted Answer

Observable characteristic of organism determined by genotype and environment

Question 13

Locus

Accepted Answer

Location of gene on a chromosome

Question 14

Homologous chromosomes

Accepted Answer

Two chromosomes in a pair – normally one inherited from the mother and one from the father

Question 15

Hybrid

Accepted Answer

Offspring of two individuals with different genotypes

Question 16

Purebred

Accepted Answer

Organism that is homozygous at all genetic loci. (AA x AA)

Question 17

Punnett Square

Accepted Answer

Used to predict probability of offspring genotypes from parental genotypes in a genetic cross

Question 18

Probability

Accepted Answer

Likelihood of an event occurring

Question 19

Monohybrid cross

Accepted Answer

Only possibility for offspring is heterozygous. (AA x aa)

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