11.2 COMPLEX PATTERNS OF HUMAN INHERITANCE

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11.2 COMPLEX PATTERNS OF HUMAN INHERITANCE

• ?WHAT YOU WILL LEARN
• -Distinguish between various complex inheritance
  patterns
• -PREDICT/ANALYZE outcomes
• -How environment can influence a trait

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READING Qs

• 1-DESCRIBE
• What effect sickle-cell anemia has on red blood
  cells
• -changes them to sickle or C-shaped.

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READING Qs

• 2-EVAULUATE
• -What is the most common blood type?
• -O

IAIA IAi IBIB IBi IAIB ii
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READING Qs

• 3-EVALUATE
• -What allele is dominant of Cch
• -C

5
READING Qs

• 4-IDENTIFY
• -A person has 22 pairs of autosomes and 2 X
  chromosomes.
• What is the persons gender?
• -FEMALE

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READING Qs

• 5-DRAW CONCLUSIONS
• -Why is a recessive sex-linked trait less likely
  to occur in females than in males?
• -males must inherit only one allele (AFFECTED X)
  to have trait

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READING Qs

• 6-PREDICT
• -Circle the genotype that represents a
  color-blind person
• -XbY

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READING Qs

• 7-LIST
• -An example of a polygenic trait.
• -skin color
• -height
• -eye color
• -fingerprint pattern

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READING Qs

• 8-EVALUATE
• -Circle the trait that shows the strongest
  genetic influence
• -blood types

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GROUP WORK APPLICATION NOTES

• -As a cooperative group complete the note sheet
  using your knowledge from the reading/discussion.
• ?HIGHLIGHT/MARK supporting info
• ?BOOK-302-310
• -As a cooperative group complete the 11.2 VOCAB
• -ALL GROUP MEMBERS AGREE on SAME DEFINITION
• -may have DIFFERENT EXAMPLES picture or words

11.2 VOCAB
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?MAIN IDEA

•  
• -Complex Inheritance traits are an EXCEPTION to
  Mendels research

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?VOCABULARY

• REVIEW gamete
• -mature sex cell with half (haploid) of
  chromosomes
• 1-any chromosomes that are not sex chromosomes
• AUTOSOMES
• 2-inheritance patterns-BOTH allele traits
  expressed in phenotype of hetero indv.
• CODOMINANCE
• 3- interaction of alleles with one allele masking
  effects of the other
• EPISTASIS
• 4-inheritance pattern-phenotype is a MIX of the 2
  homozygous parent traits
• INCOMPLETE DOMINANCE
•  

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?VOCABULARY

• 5-presence of more than 2 alleles for a genetic
  trait
• MULTIPLE ALLELES
• 6-inheritance pattern-trait controlled by 2 or
  more genes on same/different chromosomes
• POLYGENIC TRAIT
• 7- chromosomes determine the sex of an
  individual, carry sex-linked characteristics
• SEX CHROMOSOMES
• 8-traits controlled by genes located on sex
  chromosomes
• SEX-LINKED TRAITS 

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?INCOMPLETE DOMINANCE

• ANALYZE the ratios of offspring

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?CODOMINANCE

• DETERMINE Rnormal dominant Rsickle cell
  recessive
• The correct coloumn for each phenotype

x
x
x
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?COMDOMINANCE

• PREDICT the results of two people who are
  heterozygous for sickle-cell anemia but lead
  normal lives have a child
• RR x RR
• 25 RR no alleles for disease
• 50 RR heterozygous/ lead normal lives
• 25 RR homo recessive/ sickle cell disease

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?MULTIPLE ALLELES

• IDENTIFY
• the blood group that results from each
  combination of genotypes

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?EPISTASIS,SEX DET,DOSAGE COMP,SEX LINKED,
POLYGENIC

• ANALYZE
• the role of each inheritance. Give example.

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?EPISTASIS,SEX DET,DOSAGE COMP,SEX LINKED,
POLYGENIC

• REFER to punnett square to answer questions
  sex-linked
• DETERMINE gender, color vision
• 1-Does the father have color-blindness? ?yes
  ?no
• 2-Does the father have a recessive allele?
  ?yes ?no
• 3-What gender is the child with color-blindness?
  ?male ?female

x
x
x
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?ENVIRONMENTAL STUDIES

• IDENTIFY
• Environmental influences that can affect
  phenotype

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?TWIN STUDIES

• DESCRIBE
• The use of twin studies in the study of genetics.
• Scientists use twin studies to distinguish
  between __________________ and __________________
  influences on a trait. If a high percentage of
  ________________________ but not
  ________________________ express a trait, there
  is a strong chance that the trait is
  __________________.

genetic
environmental
identical twins
fraternal twins
genetic