7.1 Genetics Key Terms

Question 1

Define monohybrid inheritance

Answer 1

the inheritance of features coded for by a single gene

Question 2

Define gene

Answer 2

the set of instructions for a single polypeptide

Question 3

Define allele

Answer 3

different versions of the same gene

Question 4

Define phenotype

Answer 4

the physical/behavioural/biochemical expression of an organisms genotype

Question 5

Define genotype

Answer 5

the genetic constitution, (make-up) of an organism

Question 6

Define dominant

Answer 6

an allele that is always expressed in the phenotype when present in the genotype

Question 7

Define recessive

Answer 7

an allele that is only expressed in the phenotype when homozygous

Question 8

Define homozygous

Answer 8

both alleles for a specific gene are the same

Question 9

Define heterozygous

Answer 9

both alleles for a specific gene are different

Question 10

Define locus/loci

Answer 10

the position on a chromosome where a gene is found/occupies