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Pregnancy, Agriculture, Genetics - Coggle Diagram
Pregnancy
Hormones
Lutenising hormone
oestrogen
aids blood flow to developing offspring
aid organ development of child
stimulates progesterone production
Follicle stimulating hormone
Progesterone
maintain uterus lining to prevent menstruation
keep placenta working
uterus relaxed
hCG
ensures corpus luteum produces progesterone
Relaxin
Fertilisation
female releases egg from ovary into oviduct
male ejaculates sperm into female reproductive system (internal fertilisation)
Zygote: haploid sperm fuses with ovum
Blastocyst: 1 week the zygote grows into a ball of cells before implanting into uterus wall
Embryo: where blastocyst divides and develop in amniotic sac
Agriculture
Selective breeding : creation of organisms with desirable characteristics
natural breeding
male and female in an enclosed environment
artificial insemination
inserting sperm into females reproductive tract
artificial pollination
pollen from one flower and inserted into another using small brush
cloning
creating genetic identical copy
positives:
increased sales
higher quality food
production increase
greater pest and disease resistance
negative
reduced biodiversity
breeding out of undesirable traits
decrease gene pool
lack of variation and vulnerability
Genetics
Phenotype
organism's physical expression of a particular characteristics
structure
behaviour
physiology
Genotype and environment
genotype
organism's genetic makeup for a particular characteristics