genetics

Question 1

a different form or version of a gene - alleles usually occur in pairs

Answer 1

. allele

Question 2

a gene variant that is expressed more strongly than other versions of the same gene - the dominant allele masks the effect of the recessive a

Answer 2

dominant

Question 3

a gene that is masked by a dominant gene, and is only expressed when two copies of the gene are present

Answer 3

recessive

Question 4

• If an organism has two of the same kind of gene for a trait, it is called pure or

Answer 4

. homozygous

Question 5

An organism with two different alleles for a trait is called blank or hybrid.

Answer 5

. heterozygous

Question 6

• the genetic make up or code of an organism

Answer 6

. genotype

Question 7

the observable traits or physical appearance of an organism -

Answer 7

phenotype

Question 8

thread-like structures in the nucleus of cells that carry genetic information

Answer 8

Chromosome

Question 9

Deoxyribonucleic acid (DNA) is a molecule made up of nucleotides that contains genetic information for cell growth, division and function.

Answer 9

DNA

Question 10

a gene is a segment on a chromosome that determines a specific trait. Genes are the units of heredity.

Answer 10

Gene -