unit 2.4 characteristics and inheritance.

Q: What is genetics?

Q: What are traits and alleles?

Q: What is pure breeding?

Q: Define dominant and recessive trait.

Q: What alleles represent dominant trait and recessive characteristics

Q: What is rr and RR represetned as?

Q: what is homozygous and heterozygous?

Q: Define Punnett squares.

Q: Define genotype and phenotype.

Q: What happens if a sperm contains an X or Y chromosome fertilising the egg?

Q: What are sex linked genes?

Q: What is the difference between the X and Y chromosome?

Q: Define pedigree.

Q: give 2 examples of sex linked characteristics

Q: Define chromosomal abnormality

Q: How can mistakes happen when DNA is being copied and what is the change called?

Q: Name types of mutations.

Q: Define Mutagens.

Q: Define carcinogen.

Q: Common agents that cause mutations can happen in Chemical, Biological and radiation ways, give examples.