TERMS NEED TO KNOW **

Question 1

Define Chromosome

Answer 1

DNA is foiled tightly around proteins to condense and form chromosomes.

Humans have a copy of all 23 pairs of chromosomes in each of their cells

Question 2

Gene

Answer 2

A section of DNA that codes for a particular protein.

Question 3

Allele

Answer 3

Alternate versions of a gene

Question 4

Genotype

Answer 4

The alleles that an individual has in their DNA

Question 5

Phenotype

Answer 5

A persons observable traits

Question 6

Dominant

Answer 6

When only one allele is required for the trait to be expressed in the phenotype

Question 7

Recessive

Answer 7

When both alleles are required for the trait to be expressed in the phenotype

Question 8

Homozygous

Answer 8

To remember: Homo = one = one type of letter

When an individual has two copies of the same allele for a particular gene, either homozygous dominant or homozygous recessive.

Question 9

Heterozygous

Answer 9

When an individual contains two different alleles for a particular gene.