Genetic

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Genetic Traits
Punnett Squares
Pedigrees
Sex-Linked Traits
Name That Picture
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• During Mendels experiments, the trait that did
  not appear in the F1 generation, but reappeared
  in the F2 generation.

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What is recessive?
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1. Genetic makeup of an organism
2. The appearance of an organism
3. When both alleles are alike
4. When two alleles in a pair are different.

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1) What is genotype?2) What is phenotype?3)
What is homozygous?4) What is heterozygous?
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300

• These are four of the seven characteristics that
  Mendel studied.

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What are (four of the following) plant height,
flower position, pod color, pod appearance, seed
texture, seed color, and flower color.
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400

1. What the P stands for P generation.
2. What F stands for in F1 generation.

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1) What is parental?2) What is filial?
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• This is the dominant phenotype for the following
  traits
• Tongue-rolling
• Hair line
• Thumb shape
• Presence or absence of freckles
• Ear lobe shape

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What areAbility to tongue rollPresence of
widows peakStraight thumbPresence of
frecklesFree ear lobes?
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• This is the process (acronym) used to
• determine how alleles are arranged
• when setting up a dihybrid Punnett
• Square cross.

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What is FOIL (First, Outside, Inner, Last)?
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• This is the location of the female P alleles when
  setting up a Punnett Square.

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What is the left side?
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• This is the main difference between sex-linked
  and monohybrid Punnett squares.

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What are the sex chromosomes (X and Y)
represented in sex-linked Punnett Squares?
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400
In seals, the gene for the length of the whiskers
has two alleles.  The dominant allele (W) codes
long whiskers the recessive allele (w) codes
for short whiskers. What percentage of offspring
would be expected to have short whiskers from the
cross of two long-whiskered seals, one that is
homozygous dominant and one that is heterozygous?
(2 minutes)
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What is 0?
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• Determine the possible phenotypic outcome of a
  mate between SpongeBob, who is heterozygous for
  his yellow body color and his squarepants, and
  his wife SpongeSusie, who is blue and has
  roundpants. (2 minutes)

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What isYellow Squarepants 4/16 (1/4,
25)Yellow Roundpants 4/16 (1/4, 25)Blue
and Squarepants 4/16 (1/4, 25)Blue and
Roundpants 4/16 (1/4, 25)
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100

1. In pedigrees, this symbol represents males.
2. This symbol represents females.

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1. What is a square?2. What is a circle?
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• The above pedigree traces the recessive
  hitchhikers thumb trait. This must be Saras
  genotype.

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What is Hh (heterozygous)?
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• These are the genotypes of the following
  individuals Joe, Jim, Kay and Lori.

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What are Joe- hh (homozygous recessive)Jim- hh
(homozygous recessive)Kay- Hh (heterozygous)Lori
- Hh (heterozygous)
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• These are the genotypes of the following
  individuals I-1, I-2, II-1, II-9, III-6 (ignore
  black arrows).

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What areI-1 aa I-2 Aa II-1 Aa
II-9 Aa III-6 aa ?
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• This is what the pedigree looks like for the
  following information on the Mays family.
  Freckles are dominant to not having freckles.
• Sam does not have freckles and marries Lucy who
  does. They have four children Audrey, Rob,
  Katie and George, all of which have freckles.
  Audrey marries Jack who has freckles and they
  have three children Justin (without freckles)
  and Ted and Sylvia who have freckles. Sylvia
  marries Matt who has freckles and they have two
  children, Lucy (with freckles) and Scott (no
  freckles).
• 2 minutes to have written down on a piece of
  paper

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What is
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• These are two examples of sex-linked traits.

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What are colorblind, hemophilia, Duchenne
Muscular Dystrophy, Tay Sachs Disease?
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• A boy, whose parents and grandparents had normal
  vision, is color-blind. This is the genotype for
  his mother.

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What is XCXc?
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• A woman with red-green color-blindness has a
  mother with normal vision. Knowing that
  color-blindness is a sex-linked recessive gene,
  this is her father's phenotype.

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What is colorblind?
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• A colorblind woman marries a man with normal
  vision. What is the probability they will have
  sons who are red-green color-blind?
• (45 seconds)

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What is 100?
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• Clouded leopards are a medium sized, endangered
  species of cat, living in Central America. Assume
  that the normal spots (XN, pictured here) are a
  dominant, sex-linked trait and that dark spots
  (Xn) are the recessive counterpart. Suppose you
  are involved in a clouded leopard breeding
  program. One year you cross a male with dark
  spots and a female with normal spots. She has
  four cubs, two are male and two female. One each
  of the male and female cubs have normal spots and
  one each have dark spots. What is the genotype of
  the mother?
• (2 minutes)

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What is XNXn?
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Who is Gregor Mendel?
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What is a pedigree?
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What is incomplete dominance?
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What is codominance?
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What is sex-linked?
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Final Jeopardy
SpongeBobs aunt, who is a roundpants, has a cute
stubby nose. She has finally found the sponge of
her dreams and is ready to settle down. Her
fiancé always comments on how adorable her nose
is (he says it reminds him of his mothers aww,
how sweet!). They wonder what the chances are of
a stubby nose being passed on. Her fiancé is
homozygous squarepants and homozygous long nose.
1 song
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What is 0?