2 - Biological foundations, genetics, prenatal dev., birth

Question	Answer
Phenotype	Traits actually exhibited by an individual
Genotype	Specific inherited information
Mitosis	Duplicate cell is identical
Meiosis	halves the number of chromosomes
What gene influences the phenotype (displayed trait)	Dominant
In order to see a recessive trait in an individual, what gene does it need to be paired with?	Recessive
List the chromosomal disorders	Downs, Klinefelter, Turner, Fragile X
List the Dominant gene disorders	Polydactyl, Achondroplasia, Huntington's
List the Recessive gene disorders	Cystic fibrosis, sickle-cell, Tay-Sachs
What is the X-linked disorder?	Haemophillia
List the Multifactorial disorders	Congenital heart disease, Neural tube defect, Cleft lip/palate
What are the four stages of prenatal development?	Conception, Germinal, Embryonic, Foetal
Teratogen	A substance or environmental influence that can interfere with or permanently damage an embryo's growth
What are the 3 stages of labour	Stage 1 - Contractions to 10cm wide cervix, Stage 2 - Actual birth of baby, Stage 3 - Birth of placenta

Resource summary

	Created by Megan Wilson over 10 years ago