1. Welcome To Genetics !!

2. Genetics
The Cell Cycle
Chromosome
Terms
Meiosis Intro

3. The Cell Cycle a continuous sequence of cell growth and division
consists of three stages:
Interphase – growth of cell
Mitosis – division of nucleus
Cytokinesis – division of cytoplasm a

4. a

5. Interphase the period between cell divisions
cells undergo their normal activities (obtaining energy, synthesizing products, repairing damage, etc.)

6. Mitosis The division of the nucleus – DNA
2 IDENTICAL CELLS are created
Mitosis Super Easy

7. Cytokinesis the division of the cytoplasm and organelles
occurs after mitosis

8. Chromosome Terms Chromatin
term used to describe the genetic material during interphase
all of the DNA molecules in the nucleus

9. Chromosome Terms Chromosome
a single DNA molecule (either duplicated or unduplicated)

10. Chromosome Terms Chromatid a single strand in a duplicated chromosome

11. Chromosome Terms Sister Chromatids
single stranded chromosomes that are attached together at their centromere
genetically identical

13. When mitosis goes wrong…√
The Cell Cycle
Chromosome Terms
Meiosis Intro √

14. Meiosis somatic cells (body cells) are diploid (2n)
they contain two copies of each chromosome
human somatic cells contain 46 chromosomes

15. Meiosis
meiosis is a special type of cell division that only occurs in the reproductive organs
meiosis results in the production of reproductive cells called gametes (sperm and eggs)

16. Meiosis gametes are haploid (n)
they contain only one copy of each chromosome
human gametes contain 23 chromosomes

17. Meiosis each human sperm or egg cell contains:
1 sex chromosome that determines the sex of the individual
22 autosomal chromosomes (autosomes) that determine everything else

18. Lesson Outline √
The Cell Cycle
Chromosome Terms
Meiosis Intro √ √