Transcript Review ch 11 Patterns of Inheritance

Review ch 11
Complex Patterns of Inheritance
Biology
Types of Inheritance you should know
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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.
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Height of a person
Hand and foot size
Hair color
Skin color
Eye color
• Many genes on different
chromosomes give
unlimited phenotype
possibilities
• A red shorthorn bull may
4. ______________
• Both alleles are
expressed in the
heterozygous
condition
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?
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13. What can we learn from a Karyotype?
Give two answers:_______ and _______
Answers:
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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