variation and inheritance

Question 1

discrete

Answer 1

can be used to divide members of the same species into 2 or more distinct groups
- either have it or don’t

Question 2

continuous

Answer 2

cannot be used to divide members into 2 or more groups
- shows range of values eg height

Question 3

genotype

Answer 3

combination of genes possessed by organism

Question 4

phenotype

Answer 4

physical attributes expressed in organism

Question 5

alleles

Answer 5

different forms of a gene
- receive one allele for each characteristic from each parent
- symbol is first letter of dominant trait

Question 6

homozygous

Answer 6

organism possesses 2 identical alleles of a gene eg. GG, gg

Question 7

heterozygous

Answer 7

organsim possesed 2 different alleles of a gene eg. Gg,

Question 8

dominant

Answer 8

alleles expressed in phenotype

Question 9

recessive

Answer 9

allele only observed if homozygous

Question 10

why are predicted phenotype ratios not achieved

Answer 10

fertilisation is a random process involving some element of chance