Fertilization Notes Egg parent cell _ _ Meiosis I: A sperm or egg parent cell replicates each chromosomes into a pair of chromatids, then divides into two cells A parent cell with a heterozygous genotype will make two cells with different alleles on chromatids Meiosis II: Each cell divides again without replicating chromatids into two sperm cells or two egg cells Fertilization: an egg and sperm cell combine to make a zygote The zygote has one allele from the egg and one allele from the sperm in its genotype Meiosis 1 Meiosis II Meiosis II sperm _ egg_ sperm_ egg_ Fertilization Fertilization Meiosis II Sperm parent cell _ _ Zygote _ _ Zygote _ _ sperm_ egg_ sperm_ egg_ Meiosis 1 Meiosis II Fertilization Fertilization Zygote _ _ Zygote _ _

Fertilization Notes Egg parent cell _ _ Meiosis I: Meiosis II: sperm _ egg_ sperm_ egg_ Fertilization Fertilization Meiosis II Sperm parent cell _ _ Zygote _ _ Zygote _ _ sperm_ egg_ sperm_ egg_ Meiosis 1 Meiosis II Fertilization Fertilization Zygote _ _ Zygote _ _