Genetics

reproduction

making a copy of something

sexual reproduction

the production of offspring

egg

round object laid by a bird, reptile, or fish

sperm

male reproductive cell

fertilization

the action of fertilizing an egg to form a zygote

zygote

a diploid cell resulting from the fusion of two haploid cells

haploid

single set of unpaired organisms

diploid

two complete sets of chromosomes

DNA

main constitute of chromosomes

chromosome

nucleic acids and proteins found in the nucleus of most living cells

homologous chromosomes

a matching pair of chromosomes from each parent

Meiosis

a cell division that results in four daughter cells

genetic variation

**the variation in the DNA sequence in each of our genomes**

Selective breeding

the process of modifying the characteristics of living things especially to enhance one or more desirable traits by selection in breeding controlled by humans