1. Monohybrid Inheritance and Co-dominance

Question 1

define a locus

Answer 1

the linear position of a gene on a chromosome

Question 2

define a dominant gene

Answer 2

an expressed gene in regard to the phenotype

Question 3

define co-dominant

Answer 3

alleles which are both expressed within the phenotype

Question 4

define homozygous

Answer 4

where paired alleles are the same form

Question 5

what is monohybrid inheritance?

Answer 5

when characteristics are controlled by a single gene

Question 6

what do monohybrid crosses show?

Answer 6

the probability of alleles of a gene being inherited in the offspring

Question 7

how are the phenotypes of offspring expressed?

Answer 7

via phenotypic ratios

Question 8

if both parents are homozygous all offspring will have __________ _______________ _______, in monohybrid inheritance

Answer 8

the same phenotype

Question 9

what is the phenotypic ratio if both parents are heterozygous, within monohybrid inheritance?

Answer 9

3:1

Question 10

why might phenotypic ratios not reach the expected ratios?

Answer 10

• random fertilisation
• co-dominance
• sample was taken from a small population

Question 11

name the alleles for a pink flower (co-dominance)

Answer 11

CR CW