2. Asexual vs. sexual reproduction

4. Fig. 8-1a

7. Prokaryotic asexual reproduction BINARY FISSION

9. Prokaryotic chromosomes
Fig. 8-3b
Prokaryotic chromosomes

10. Your chromosomes are organized into homologous pairs
Fig. 8-12
Your chromosomes are organized into homologous pairs
One from mom
One from dad
Have genes for the same traits
May be different forms of the gene however
Homologous pair of
chromosomes
Centromere
One duplicated
chromosome
Sister chromatids

11. Adults produce gametes (sex cells) by meiosis
Life cycle of humans
Adults produce gametes (sex cells) by meiosis
-these are haploid
cells
Haploid gametes (n = 23) n
Egg cell n
Sperm cell
Meiosis
Fertilization
Haploid gametes fuse during fertilization
-forming a zygote that is diploid
Diploid
zygote
(2n = 46) 2n
Multicellular
diploid adults
(2n = 46)
Zygote divides by mitosis, cells differentiate during development  creating the adult
Mitosis and
development

12. In Meiosis I,
duplicated homologous chromosomes pair up and then are separated into separate cells
Diploid
Haploid
In Meiosis II, duplicated chromosomes are split, each chromatid going into a separate cell
Haploid