Review ch 11 Complex Patterns of Inheritance

Biology

Types of Inheritance you should know

• Incomplete Dominance• Co-dominance• Multiple Alleles• Epistasis• Sex Determination• Dosage Compensation• Sex-Linked Traits• Polygenic Traits• Environmental Influences

What type of Inheritance is shown in the following slides?

• On a blank sheet of paper, write your name, class hour, and number it from #1-12.

• Work with your table partner to determine the types of inheritance patterns from the following examples………->

1. ______________• The image shows a

heterozygote both the dominant normal red blood cell and the recessive sickle cell present at the same time.

• Heterozygous individuals are able to live relatively normal lives

2. ______________• The heterozygote is an intermediate phenotype

between the dominant and recessive phenotypes.

3. _________________• Some traits exhibit many

phenotypes and vary across a broad range.– Height of a person– Hand and foot size– Hair color– Skin color– Eye color

• Many genes on different chromosomes give unlimited phenotype possibilities

4. ______________• Both alleles are

expressed in the heterozygous condition

• A red shorthorn bull may be all red, all white, or a combination of red and white hair in the heterozygous (roan cattle)

5. ______________

• This inheritance can also show a hierarchy of dominance from just 4 alleles

Two answers needed: 6. ____and______

• Blood groups in Humans have three alleles, two are dominant and one is recessive.

• Both dominant alleles show as individual phenotypes when combined in heterozygotes

7. ______________

• A person’s gender is determined by just one set of chromosomes. If the y chromosome is present, the offspring will be a male.

8. ______________• This inheritance pattern event occurs in females of all

mammals as they have XX while males have Xy. This is also called X-inactivation. Example: Calico cats can only be female

9. ______________• This inheritance pattern

results when one allele hides the effect of another allele.

• Dominant E allele will determine if the coat will have any dark pigment

• Dominant B allele determines how dark the pigment will be

10. ______________

• This inheritance pattern is more likely to be present in males than in females. Traits are found on the X chromosome which men only have Xy

11. _____&_____• This inheritance is

more likely to be present in males than females, and females could be a “carrier” without showing any symptoms.

• Can males be a carrier of a recessive hemophilia allele? _______

12. What has to happen for a girl to be colorblind?

• _________________

13. What can we learn from a Karyotype?Give two answers:_______ and _______

Answers:

• 1. codominance• 2. incomplete dominance• 3. polygenic inheritance• 4. codominance • 5. multiple alleles• 6. multiple alleles and

codominance• 7. sex determination• 8. dosage compensation• 9. epistasis

• 10. x-linked• 11. x-linked, no • 12. A girl who is colorblind

must get a colorblind gene from her mom and her dad must be colorblind (XbXb)

• 13. number of chromosomes, sex of offspring, if any nondisjunctions have occured