Meiosis and sexual life cycles 

Random fertilization

________: because each sperm and egg is different, as a result of independent assortment and crossing over, each combination of egg and sperm is unique.

Gametes

________: reproductive cells that transmit genes from one generation to the next.

Meiosis

________: the type of cell division that reduces the numbers of sets of chromosome from two to one.

Fertilization

________: the combination of a sperm cell and an egg cell, one haploid gamete from the father fuses with one haploid gamete from the mother.

Locus

________: the ________ of a gene on a chromosome.

Karyotype

________: picture of its complete set of chromosomes, arranged in pairs of homologous chromosomes from the largest pair, to the smallest pair.

Genes

________: segments of DNA that code for the basic units of hereditary and are transmitted from one generation to the next.

Genetic variation

________ produced in sexual life cycles contribute to evolution.

Sexual reproduction

________: two individuals contribute genes to the offspring.

Life cycle

________: the generation to generation sequence of stages in the reproductive history of an organism.

Somatic cells

________: (46 chromosomes) any cells in the body that are not gametes.

Independent assortment of chromosomes

________: in metaphase I when the homologous chromosomes are lined up on the metaphase plates, they can pair up in any combination with any of the homologous pairs facing either pole.

Meiosis

________ reduces the number of chromosome sets from diploid to haploid.