1. Genetics

2. Flower dissection

3. 1. What is the name of the male reproductive part of a flower
1. What is the name of the male reproductive part of a flower? (Name ALL if there are more than one)
2. What is the name of the female reproductive part of a flower? (name ALL if there are more than one)
3. WHERE on the flower is the pollen?
4. How is a new flower produced? (meaning how does pollination happen?)
5. Identify structure A, B, C and D and write their FUNCTION.
Quiz B A C D

4. Mendel Brainpop Video -Blending Theory of Inheritance
-Why he chose Pea Plants
-Controlling pollination (Anther produces pollen = sperm, stigma leads to ovary)
-Had to prevent self-pollination by removing anthers
Brainpop Video

5. F1 and F2 Generation Practice:
Dominant
Recessive
Round seed
Wrinkled seed
Purple color
White color
Tall stem
Short stem
Practice:
#1: What would the F1 generation look like if a plant with round seeds was cross pollinated with a plant with wrinkled seeds?
#2: What would the F2 generation look like if the results form above were self pollinated?
#3: What would the F1 generation look like if a plant with tall stems was cross pollinated with a plant with short stems?
#4: What would the F2 generation look like if the results form above were self pollinated?

6. Mendel’s Two Laws:
Independent assortment - factors controlling different characteristics are inherited independently of each other.
Allele for
Purple flowers
Allele for
White flowers
-Every organism has 2 copies of the same gene
-The gene may have different versions: usually 2.
-Different alleles (versions) account for most of the variation among organisms
law of segregation - there are two factors controlling a given characteristic, one of which dominates the other, and these factors separate and go to different gametes when a parent reproduces.

7. Homo = same Hetero = different
Mini Lesson
Genotype
Phenotype
Explanation
The ALLELES the individual inherits from parents
The EXPRESSIN of the genotype (what it looks like)
Example 1 PP
Purple Flowers
Example 2 Pp
Example 3 ll
Short stems
Example 4 Ll
Long stems
Example 5 Rr
Round seeds
Fertilization = resulting gamete gets one allele from each parent.
Homo = same Hetero = different
Which of the examples above are homozygous? Which are heterozygous?

8. Probability
Sperms
Eggs

9. Punnett Squares Practice:
#1. Homozygote dominant crossed with a heterozygote
#2. Homozygous recessive crossed with a homozygous dominant
#3. Heterozygote crossed with a heterozygote
929 plants
705 purple (76%)
224 white (24 %)

10. Incomplete dominance

11. Codominance

12. Polygenic inheritance
Skin color
Eye color
Height

14. Pleiotropy

15. Pleiotropic versus polygenic

16. Autosomal traits
Autosomal traits are controlled by genes on one of the 22 human autosomes
 Examples:
The allele for free-hanging earlobes (F) is dominant to the allele for attached earlobes (f).
widow’s peak is dominant over no widows peak
Rolling your tongue is dominant over not being able to.

17. Sex Linked Traits Traits controlled by genes on the sex chromosomes
 X-linked traits in the case of the X chromosome.
X-linked traits have a different pattern of inheritance than autosomal traits because:
males have just one X chromosome.
always inherit their X chromosome from their mother
they pass it on to all their daughters but none of their sons

18. Autosomal Genetic Disorders
caused by mutations in one or a few genes on an autosome (chromosome #s 1-22)
If it is on an autosome, it can either be a “dominant disorder” or a “recessive disorder”
If it is a dominant disorder you will express the disorder if you are heterozygous for the trait or homozygous dominant.
If it is a recessive disorder you will only express the disorder if you are homozygous recessive for the trait.
AA/Aa aa

19. Sex-Linked Genetic disorders
Disorders that are a result of 1 or more genes on a sex chromosomes (usually the x)
X LINKED RECESSIVE DISORDERS (most common):
If a male carries 1 mutated copy of the gene he will have the disorder.
A female needs 2 mutated copies of the disorder to have the disorder.
If a female has 1 mutated copy she is called a “carrier”, meaning she does not have the disorder but can pass it on to her offspring.

20. Chromosomal Genetic Disorders
Caused by an abnormal number of chromosomes
Mistakes may occur during meiosis that result in nondisjunction.
This is the failure of replicated chromosomes to separate during meiosis.
Some of the resulting gametes will be missing a chromosome, while others will have an extra copy of the chromosome

21. Examples of chromosomal disorders

22. Autosomal Genetic Disorders

23. Sex Linked Genetic Disorders

24. Pedigrees
A pedigree is a representation that shows the blood relationships of family members
It shows individuals expressing the trait or disorder under study.
The chart describes relationship to various members of the family
It can also show the origin of a particular trait or disorder.

25. Inheritance patterns

26. Treating genetic diseases
Genetic counseling
Just treat symptoms (PKU, cystic fibrosis, insulin for symptom prevention)
Gene therapy: replacing the defective gene
Somatic cell gene therapy
Germ cell gene therapy (controversial)

27. Pedigree Rules

28. Pedigrees

29. Layer B 1. Mendel Photobook/scrapbook
3. Blood Typing Webquest: /index.html
2. Blood Type Mystery
4. Punnett Square practice packet
Extra Credit:
Biotechnology brochure (processes, uses)
As a class:
Baby lab
Article jigsaw
Gattaca

30. Layer A
Genetic Counselor Project