2.4 Inheritance

Question 1

Locus

Answer 1

The location of a gene on a chromosome.

Question 2

Homologous Chromosomes

Answer 2

Chromosome pairs that are:
- Approximately the same size
- same banding pattern (same gene on the same corresponding loci)

Question 3

Alleles

Answer 3

Different versions of a gene.
e.g. Eye colour gene: blue vs brown allele

Question 4

Dominant Allele

Answer 4

A dominant allele will be expressed no matter what, only needs one to express the trait. (Ee or EE)

Question 5

Recessive Allele

Answer 5

A recessive allele will only be expressed if both chromosomes carry that allele. (ee)

Question 6

Genotype

Answer 6

What alleles you have

Question 7

Phenotype

Answer 7

physical trait expressed

Question 8

Homozygous dominant

Answer 8

A genotype where an individual inherits two copies of a dominant gene.

Question 9

Homozygous Recessive

Answer 9

A genotype where an individual inherits two copies of a recessive gene.

Question 10

Heterozygous genotype

Answer 10

Having two different versions of a gene, one inherited from each parent.