Grade 9 Science Biology Review - Understand the process of mitosis - Understand what DNA is, what it is made up of and which base pairs match together. - Know the difference between asexual and sexual reproduction. What are some benefits and disadvantages of each. - What are the 3 types of asexual reproduction? - Know the different chromosomal abnormalities and the details behind each. Know how to read a karyotype chart. - Understand what is meant by homozygous, heterozygous, alleles, traits, genotype, phenotype - Know how to use a punnet square