Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern”...
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Transcript of Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern”...
![Page 1: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/1.jpg)
Introduction to Genetics
Heredity….
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Gregor Mendel
Austrian Monk--Discovered a “pattern”
while working in the garden
PEAS have “traits” or characteristics
--color of flower--color of seed--height of plant
![Page 3: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/3.jpg)
Pea Plant Experiment
Purple x WhiteFlower Flower
All offspring PURPLE
(Parents) P1
( Kids)F1
![Page 4: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/4.jpg)
Mendel’s Experiment
Some TRAITS, such as purple color of the flower, OVERTAKES the other color white.
A dominant trait, if present, will “overtake” the other trait and will be expressed.
Therefore, PURPLE IS DOMINANT to white.
![Page 5: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/5.jpg)
Pea Plant Experiment…. Part 2
Purple X Purple flower flower
¾ were purple ¼ were white
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Mendel’s Experiment, part 2
Some traits will “reappear” ….such as the white color of the pea plant flower.
RECESSIVE traits often will “hide” in one generation but then “appear” in another.
WHITE FLOWER is RECESSIVE to the PURPLE FLOWER
![Page 7: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/7.jpg)
Mendel’s Experiment OVERVIEW
Purple Flower x White Flower
All purple flowers
Purple flower x Purple Flower
¾ Purple Flowers¼ White Flowers
Generation 1
Generation 2
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REALIZATIONS from MENDEL’s experiment
*Some traits are “dominant” and others are recessive
*The kids must “get information” from the parents
-- Genes control a “trait” Alleles are different versions of a gene
“P” purple (we will use CAPITAL letters for dominant traits)
“p” white (we will use LOWER CASE letters for recessive traits)
![Page 9: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/9.jpg)
Additional Vocabulary
Phenotype is the “physical trait description”Purple flower or white flower
Genotype is the combination of “alleles or genes”
PP or Pp this would represent purplepp this would represent white
![Page 10: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/10.jpg)
Gather information from your parents….
You need to collect some information from your parents and siblings (as well as yourself).
Use the next part to help you collect your data….
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Traits….
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Traits…
![Page 13: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/13.jpg)
Traits…
![Page 14: Introduction to Genetics Heredity….. Gregor Mendel Austrian Monk --Discovered a “pattern” while working in the garden PEAS have “traits” or characteristics.](https://reader037.fdocuments.in/reader037/viewer/2022110319/56649c7d5503460f94932697/html5/thumbnails/14.jpg)
Huber’s FamilyTraits Jeff Terra Ty
Forelock (widow’s peak)
No forelock No forelock No forelock
Dimples (cleft chin) No Yes Yes
Thumb Straight Straight Straight
Pinky Straight Bent Bent
Mid-Digit hair Yes No No
2nd Toe Shorter Longer Longer
Tongue Rolling Can roll Can roll ??