1. Start-up for 12/8/14
Complete the word search regarding meiosis terminology. If you are the first person finished, let me know.

2. Sexual Cell Reproduction Ch. 11 Section 4 Page 275-278
Meiosis & Genetics
Sexual Cell Reproduction
Ch. 11 Section 4
Page

3. Objectives: Students will
Identify our genetic material and its location.
Summarize the relationship between DNA, alleles, genes, chromosomes, and traits.
Identify the locations of meiosis
Summarize why half of an individual's genetic information comes from each parent
Determine an individual's sex based on their chromosome makeup.

4. Chromosomes DNA X Code for traits Nucleus
Identify our genetic material and its location.
Chromosomes
DNA
Code
for
traits X
Nucleus

5. All of these determine traits.
Obj. B) Summarize the relationship between DNA, alleles, genes, chromosomes, and traits.
All of these determine traits.
Hair
Color X B b
DNA
Chromosome
Allele
Gene
= smallest unit
Eye
Color g g

6. What is this? DNA Gene Segment For Hair color 2 Alleles Gene
Obj. B) Summarize the relationship between DNA, alleles, genes, chromosomes, and traits.
What is this?
DNA
2 Alleles
Gene
Chromosome
Gene Segment
For Hair color

7. Trait Characteristic Feature Variations in a population
Obj. B) Summarize the relationship between DNA, alleles, genes, chromosomes, and traits.
Trait
Characteristic
Feature
Variations in a population
Can you ID some traits on this man?

8. Meiosis in the Gonads Sperm Egg Meiotic cell division Testis Ovary
Obj. C) Identify the locations of meiosis
Meiosis in the Gonads
Testis
Ovary
Sperm
Meiotic cell
division
Egg

9. MEIOSIS GG PERM Gonads make gametes! In males TESTES make sperm
Obj. C) Where does meiosis occur?
Gonads make gametes!
MEIOSIS GG
PERM
In males TESTES
make
sperm

10. Gonads make gametes! In females OVARIES make eggs
Obj. C) Where does meiosis occur?
Gonads make gametes!
In females
OVARIES
make
eggs

11. Chromosome Number Homologous Chromosomes are the sets of each pair
Obj D) Summarize why half of an individual's genetic information comes from each parent
Chromosome Number
If a lizard’s diploid # is 36, what is its haploid #?
Different # for different species
Full set = 2N=Diploid
N = Haploid
# pairs
1 pair from mother
1 pair from father
Humans= 23 homologous chromosomes (pairs) or 46 total
Homologous Chromosomes are the sets of each pair 18
Why are total chromosome numbers always even?
They come in pairs

12. Autosomes & Sex Chromosomes
Obj. E) Determine an individual's sex based on their chromosome makeup.
Autosomes & Sex Chromosomes
Autosomes = # 1-22 for all traits except sex
Sex chromosomes=
Pair # 23 XX(female) or
XY(male)

13. Obj. E) Determine an individual's sex based on their chromosome makeup.
Male or
Female?
Male

14. What is the problem? Down Syndrome= 3 of #21 Male or Female?
Obj. E) Determine an individual's sex based on their chromosome makeup.
What is the problem?
Down Syndrome= 3 of #21
Male or
Female?

15. Understanding Check Complete the following and finish CH 11-4 Link words.
Place these in order from smallest to largest: gene, allele, DNA, chromosome.
Where does meiosis occur in males and females?
What are homologous chromosomes? How many do humans have?
What is the genetic make-up of a female?
Why is the chromosome number usually even?