inheritance

Question 1

alleles=

Answer 1

variations of the same gene(one from mum one from dad)

Question 2

dominant allele=

Answer 2

only needs to be inherited from one parent in order for the characteristic to show up as a phenotype

Question 3

recessive allele=

Answer 3

needs to be inherited from both parents in order for the characteristic to show up as a phenotype

Question 4

homozygous dominant=

Answer 4

two copies of a dominant allele

Question 5

homozygous recessive=

Answer 5

two copies of a recessive allele

Question 6

heterozygous=

Answer 6

two alleles of a gene are different

Question 7

genotype=

Answer 7

the combination of alleles that control each characteristics

Question 8

phenotype=

Answer 8

the observable characteristics of an organism e.g eye colour

Question 9

codominance=

Answer 9

when more than one allele is expressed in the phenotype at the same time

Question 11

Explain what is mean by the term dominant allele [2 marks]

Answer 11

An allele is a form of a gene. A dominant allele only requires it to present for the phenotype to be expressed

Question 12

What is a mutation? [2 marks]

Answer 12

A random[1 mark] change[1 mark] in the allele[1 mark]