T2L12 Genetic inheritance and meiosis

Question 1

What is a locus

Answer 1

The location of a gene on a chromosome

Question 2

Define recessive

Answer 2

An allele that only shows its effect on the phenotype when the dominant allele is not present (a recessive allele has been inherited from both parents)

Question 3

Define dominant heterozygous

Answer 3

When only one of this allele is required to show was the phenotype. E.g Aa will show as phenotype because the dominant A is rpesent

Question 4

Define gene

Answer 4

A length of DNA that codes for a polypeptide

Question 5

Define genotype

Answer 5

The type of alleles or genes that an organism has

Question 6

Define phenotype

Answer 6

The characteristics caused by the genotype or the observable effects of the genotype

Question 7

Define Heterozygous

Answer 7

When an organism has two different copies of an allele

Question 8

Define Allele

Answer 8

Version of a gene

Question 9

Define homozygous

Answer 9

When an organism has two identical copies of a gene

Question 10

Name two types of genetic ‘tracking’

Answer 10

Punnet square and Pedigree diagram