Download Complex Patterns of Inheritance

12.2 X­linked and Blood Type.notebook
Warm Up
Problem Solving Lab Page 311
April 13, 2015
a. heterozygous
b. homozygous
c. phenotype
d. genotype
e. diploid
f. haploid
g. gamete
1. the physical appearance
2. a cell with paired chromosomes
3. having two of the same alleles for a trait
4. egg or sperm
5. having half the chromosomes of a normal body cell
6. the alleles an individual has
7. having two different alleles for a trait
Oct 28­9:21 AM
1. the physical appearance
Oct 16­7:53 AM
Essential Question
2. a cell with paired chromosomes
3. having two of the same alleles for a trait
What are other patterns of inheritance?
4. egg or sperm
5. having half the chromosomes of a normal body cell
6. the alleles an individual has
7. having two different alleles for a trait
List three patterns of inheritance and list how many phenotypes and genotypes are possible.
Oct 16­7:53 AM
Incomplete Dominance ­ phenotype of the heterozygote is intermediate between those of the two homozygotes.
Cross a red flower plant with a white flower plant ­ get a pink flowered plant.
Apr 8­4:22 PM
Sex­linked Traits:
­ the gene is located on the X chromosome
­ males are XY and females are XX, therefore females have one more allele for these genes
­ examples are color­blindness and hemophilia
Phenotypes:
Genotypes:
Male normal
Male with disorder
Female normal
Codominance ­ Both alleles are expressed in the heterozygote.
Female carrier
Female with disorder
Cross a female carrier for color­blindness with a normal male. What are the chances of having a color­blind child?
Apr 8­4:23 PM
Oct 16­8:03 AM
1
12.2 X­linked and Blood Type.notebook
April 13, 2015
Human Blood Type
­ determined by multiple alleles (having more than two possibilities)
­ the alleles are ______________
­ A and B are codominant and o is recessive
Phenotypes:
Type A
Genotypes:
Polygenic inheritance is controlled by two or more genes.
In Polygenic inheritance each uppercase letter contributes an equal portion of the trait being expressed.
Type B
AABBCCDD ­ very tall
aabbccdd ­ very short
AABBccdd ­ middle height
AaBbCcDd ­ middle height
aabbCCDD ­ middle height
Type AB
Type O
Cross a man with blood type AB and a female with type O. Give the expected ratios of the children's blood types.
Oct 16­7:59 AM
When graphed, a bell­shaped curve is formed. See page 320.
Mar 22­7:46 AM
The ABO Blood Group
Environmental Influences
Temperature, nutrition, light, chemicals, and infectious agents all can influence gene expression. Using page 325, draw a diagram of the red blood cells, one for each blood type. Label the phenotypes and genotypes of each.
For example, temperature can affect coat color.
Mar 22­7:51 AM
Mar 13­8:16 AM
Mar 17­8:13 AM
2