BiologyJanuary 31 st Get out your annotated Blue People article! Reminders: DNA Genetics Internet...
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Transcript of BiologyJanuary 31 st Get out your annotated Blue People article! Reminders: DNA Genetics Internet...
Biology January 31st
Get out your annotated Blue People article!
Reminders:DNA Genetics Internet Activity
due tomorrow!!
Blue People of Troublesome CreekComplete the following tasks with your
group:Create a list of the words you do NOT
knowShade the circles and squares of the
people who are blue in the pedigreeAnswer the following questions:
◦What made some members of the Fugate family blue?
◦Who diagnosed the disorder?◦Why did the Fugates marry into their own
family? ◦What two industries brought progress to
KY?
Why do you look like that?
Genetics = Study of Heredity
Passing of genes, or traits, from parent to
offspring
GenesSegments of DNA on
chromosomes that determine specific traits
Two forms of every gene!◦Called alleles◦Represented by capitol or lowercase
letters Ex: H or h (same letter, different form)
◦Alleles make up your genotype◦Genes determine your physical
appearance!
TraitsInherited Characteristics
Observable Traits = Phenotype
Physical Characteristic
sEx: Hair color, eye color, freckles, dimples, right-handed
Traits ContinuedDominant Trait = will always be
seen when a copy of the allele is present◦Represented by capitol letter◦Ex: Right-handed (H)
Recessive Trait = hidden when the dominant allele is present◦Represented by lower case letter◦Ex: Left-Handed (h)
GenotypeThe genes that are present in an
individual ◦Represented by 2 letters!
Homozygous: 2 of the same alleles or genes◦Homozygous dominant: 2 dominant alleles
Ex: HH
◦Homozygous Recessive: 2 recessive alleles Ex: hh
Heterozygous: 2 alleles that are opposite◦One dominant and one recessive
Ex: Hh
Happy Friday!!Turn in your DNA Genetics
Internet ActivityGet out your Genetics Practice
Problems from Thursday, as well as your notes
Genetics Quiz TUESDAY!!
Practice #3
Straight hair is dominant to curly.
_________ Straight_________ straight
(heterozygous) _________ curly
Punnett SquaresUsed to predict the traits of
offspringMom’s
genotype
Dad’s
genoty
pe
Possi
ble Offsp
ring
genotypes
More Practice
Use the punnett square on #2 to answer the following question:If you crossed a heterozygous short haired guinea pig with a long haired guinea pig, what percentage of the offspring would have long hair?
In hobbits, hairy toes (H) are dominant to smooth toes(h).
Cross a homozygous hairy toed hobbit with a heterozygous
hairy toed hobbit.
In pea plants, purple flowers (P) are dominant to white
flowers(p). Cross 2 homozygous purple flower plants.
In guinea pigs, brown hair (B) is dominant to spotted hair (b). Cross 2 heterozygous
brown guinea pigs.
Widow’s peak (W) is dominant to a smooth hairline (w). Cross a woman who is homozygous for widow’s peak with her husband,
who has a smooth hairline.