Biology B
Week 3
Standard 1B: Genetics
Ms. Darlak
Warm-up 12/19
WW
ww
Ww
ww
Ww
ww
ww
Ww
ww
Ww
Ww
Ww
What is the genotype for individual #12, if
individual #1 is WW.
Is this showing a dominant or recessive trait?
Agenda 12/19
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Questions?
Standard 1B
2B Clicker Pretest
Warm-up 12/15
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Does the following pedigree show a dominant
or recessive trait? How do you know?
Is the trait carried on an autosomal or sex
chromosome?
Warm-up 12/15
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Recessive
Sex-chromosome
Who are carriers, give to sons only?
Agenda 12/15
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Quiz II Multiple Alleles & Sex linked traits
Thacker Family Pedigree pp. 22-24
Mixed Genetics Review p.25
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Due Wednesday
STANDARD 1B FRIDAY!
Thacker Family Pedigree
Some people are born with extra fingers or toes.
This condition, known as polydactyly, is rare.
 Family Story pps. 22-23
 Construct a Pedigree for whole family on p.24
 Include Names
 Genotypes
Classwork/Homework
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Thacker Family Pedigree pp.22-24
Mixed Genetics Review p.25
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On separate piece of paper.
SHOW ALL WORK!
Bio Warm-up 12/16
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In northeast Kansas there is a creature
known as a wildcat. It comes in three colors,
blue, red, and purple. A homozygous
individual is blue, a homozygous individual is
red, and a heterozygous individual is purple.
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What would the genotypes and phenotypes
of the offspring be if a blue wildcat was
crossed with a red one?
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What Mode of Inheritance is this?
Answer:
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B= Blue, R= Red,
R
BR= Purple
BB (blue) x RR (red).
Genotypes:
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100% BR
R
B
BR
BR
BR
BR
Phenotypes:
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B
100% Purple
Incomplete Dominance, two phenotypes
produce a BLEND or intermediate.
(remember white + red = pink)
Agenda 12/16
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Quiz Pass Back
Thacker Family Pedigree Check
Mixed Genetics Review p. 25 DUE 12/17
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Standard Questions Review (GROUP)
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On separate piece of paper.
SHOW ALL WORK!
Due Thursday
Pedigree Quiz Wednesday
STANDARD 1B FRIDAY!
Most common missed question.
50% Female carrier
50% Female no trait
50% Male has trait
50% Male no trait
25% Offspring
Have trait
Warm-up 12/17
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Draw a pedigree to depict the following family:
One couple has a son and a daughter with
normal pigmentation. Another couple has one
son and two daughters with normal
pigmentation. The daughter from the first couple
has three children with the son of the second
couple. Their son and one daughter have
albinism; their other daughter has normal
pigmentation.
Answer
Agenda 12/17
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Thacker Family Check
Pedigree Quiz
Mixed Genetics Problems Due
Standard Questions Review
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Due Thursday Tomorrow!
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1B Review Chart
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STANDARD 1B FRIDAY!
Thacker Family Pedigree
Zz
zz
Zz
Zz
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zz
Zz
zz
zz
Polydactyl = Z
 Dominant Trait
p. 24
zz
zz zz
zz
zz
zz
zz
zz
Zz
Zz
Zz zz
zz
zz
Zz
Mixed Genetics Problems
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Answer Key on Class Website
Group Review
1.
2.
3.
4.
5.
6.
7.
Define the terms homozygous and heterozygous. Give examples.
What are dominant and recessive alleles? Give examples.
Define the terms genotype and phenotype. Give examples.
Describe four inheritance patterns besides simple dominance.
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Give an explanation of each.
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Create a visual example for each.
What is the difference between incomplete dominance and codominance?
Give a visual example to show the difference.
Construct 5 genetics problems, one for each of the five modes of inheritance.
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For each question, create a scenario describing the phenotypes of the
individuals, or other required information to compete the problem.
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Ask a specific question in each problem.
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Your problem must have an answer key that includes all work. Punnett
square, genotypic and phenotypic ratios.
Create a recessive or dominant pedigree, with at least 10 individuals; this will
be the answer key. Give verbal information for all of the individuals, so that a
classmate could construct the same pedigree that you made.
Warm-up 12/18
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A human female "carrier" who is
heterozygous for the recessive, sex-linked
trait causing red-green color blindness
marries a male who is not colorblind. What
proportion of their male progeny will have
red-green color blindness?
Sex-linked Answer:
XN – normal
Xn – colorblind
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XN
Y
XNXN
XNY
XN
Male = XNY
Female = XNXn
Genotypes:
 25% XNY
NXn
n
 25% XnY
X
X
 25% XNXn
 25% XNXN
Phenotypes:
 MALES: 50% normal, 50% colorblind
 FEMALES: 100% normal
Answer: 50% of males will be colorblind
XnY
Agenda 12/18
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Standard Questions Review (Group)
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Due Today
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1B Review Chart see p. 26
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STANDARD 1B TOMORROW!
Standard 1B Review
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Look over 3 quizzes (3 Modes, Sex-linked & Multi-Alleles, Pedigree)
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Mixed Genetics Problems p.25 (Many have not done)
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What did you get wrong?
Do you understand why it was wrong?
Do you need it explained again?
#1-11 to meet standard (3)
#12-15 to exceed standard (4 or 5)
Create Questions with answer sheet (use p. 26 to help)
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Exchange questions with another person/group.
Check your answers with their answer sheet.
Does question make sense? Does answer make sense?
What is the mode of inheritance?
Genetics Bingo
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ALLELE
GENOTYPE
PHENOTYPE
INCOMPLETE
DOMINANCE
CODOMINANCE
SEX-LINKED
MULTI-ALLELIC
SIMPLE
DOMINANCE
MENDEL
RR
RW
RB
BB
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WW
TT
Tt
tt
HOMOZYGOUS
HETEROZYGOUS
HOMOZYGOUS
RECESSIVE
HOMOZYGOUS
DOMINANT
0%
25%
50%
75%
100%
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PEDIGREE
PUNNETT SQUARE
AUTOSOME
SEX-CHROMOSOME
22 PAIR
1 PAIR
IA i
IB i
IA IA
IA IB
ii
IA IB x IB IB
IA IB x IB i
XhXh x XHY
RW x RW