Key Terms/glossary

Question 1

Define DNA:

Answer 1

A self replicating material that is present in all living things

Question 2

Define a gene:

Answer 2

Passed from parents to the offspring

Question 3

Define chromosome:

Answer 3

Thread like structures located in the nucleas

Question 4

Define Allele:

Answer 4

One or two more versions of a DNA sequence

Question 5

Define domanant:

Answer 5

Describes an allele that is always expressed

Question 6

Define recessive :

Answer 6

Describes a allele that is only expressed in the absence of a dominant allele

Question 7

Define homozygous:

Answer 7

When someone has two identical alleles of genes

Question 8

Define heterozygous:

Answer 8

When someone has two different alleles of gene

Question 9

Define genotype:

Answer 9

An organisms genetic composition. Describes all alleles

Question 10

Define a phenotype:

Answer 10

An organisms observable characteristics due to interactions of the genotype and environment

Question 11

Define zygote:

Answer 11

A diploid cell formed by the fusion of the nucleas of a male gamete with the nucleas of a female gamete

Question 12

Define mitosis:

Answer 12

Produces two identical daughter cells. Full set of 46 chromosomes

Question 13

Define meiosis:

Answer 13

4 non identical daughter cells. Half the amount of chromosomes 23