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BC Science 9 Ch6

BC Science 9 Chapter 6

Reproduction requiring two parents Sexual reproduction
Inherited genetic differences Genetic diversity
Having two sets of chromosomes Diploid
Having one set of chromosomes Haploid
Haploid sex cells Gametes
Union of egg and sperm Fertilization
Very 1st diploid cell Zygote
Male gamete Sperm
Female gamete egg
Cell division that produces gametes Meiosis
Reduction division Meiosis 1
Zygote after a number of cell divisions Embryo
Matching pairs of chromosomes Homologous chromosomes
Looks like mitosis Meiosis 2
Sister chromatids exchanging parts Crossing over
Process explaining how chromosomes line up during metaphase 1 Independent assortment
Picture of chromosomes Karyotype
Disease or disorder with a specific group of symptoms Syndrone
Trisomy 21 Down syndrome
Sperm and egg unite outside the body External fertilization
Sperm and egg unite inside the female Internal fertilization
In plants, transfer of the sperm to ovules Pollination
In plants, contain the sperm Pollen
In plants, contain the eggs Ovules
In plants, the male reproductive structure Stamen
In plants, the female reproductive structure Pistil
Early development of an organism Embryonic development
Ball of cells Morula
Hollow ball of cells Blastula
Structure when the blastula organizes into germ layers Gastrula
Forms skin and nervous tissue Ectoderm
Forms some organs and muscle Mesoderm
Forms the digestive system Endoderm
After 8 weeks the embryo becomes a ... Fetus
Early stages of development; structure is called an ... Embryo
Created by: darrinaustin