basic definitions

Question 1

define a gene

Answer 1

a section of DNA found in a chromosome that codes for a specific polypeptide

Question 2

define an allele

Answer 2

different versions of the same gene

Question 3

define a locus

Answer 3

position of a gene or chromosome

Question 4

what are the two types of homozygous alleles

Answer 4

homozygous dominant
homozygous recessive

Question 5

give an example of homozygous dominant

Answer 5

AA

Question 6

give an example of homozygous recessive

Answer 6

aaa

Question 7

what is a hetrozygous allele

Answer 7

one of both dominant and recessive Aa

Question 8

define codominance

Answer 8

combination of features or both features represented

Question 9

give two examples of things that have multiple alleles

Answer 9

human blood (A,B,O)
hair colour

Question 10

define dominant

Answer 10

features of the genotype that are always expressed in the phenotype

Question 11

describe recessive

Answer 11

an allele that on its own will not affect the pheonotype of an individual

Question 12

what is tthe typical ratio for di-hybrid inheretance

Answer 12

9:3:3:1

Question 13

define genotype

Answer 13

the genetic constituation of an organism

Question 14

define phenotype

Answer 14

individuals observable traits and characteristics