Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet...
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Transcript of Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet...
![Page 1: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/1.jpg)
Mendelian Genetics Day 2
AIM: How can we tell what traits anoffspring will have?
DO NOW: Worksheet(you have 5 minutes!)
HOMEWORK: SpongeBob SquarePants exercises
![Page 2: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/2.jpg)
A. Mendel studied many different traits of peasex. flower color, seed pod shape, pea wrinkliness
1. All of these things are controlled by alleles
What's an allele?
Allele – different versions of a gene for a trait
![Page 3: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/3.jpg)
Mendel learned 2 things from his experiments:
1.Genes are passed from one generation to the next2.Genes come in (at least) pairs
What made him think genes were passed down?
Why did he think genes came in pairs?
![Page 4: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/4.jpg)
Mendel realized that there aredominant and recessive traits
Dominant - can mask or hide a recessive traitRecessive - can only be seen if there are 2 recessive alleles for the trait. Otherwise, the dominant one will hide it!
*REMEMBER! Dominant does not mean better and recessive does not mean worse!*
![Page 5: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/5.jpg)
P generation
F1 generation
F2 generation
What’s dominant here?How do we know?
What’s recessive here?How do we know?
![Page 6: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/6.jpg)
Homozygous - the trait has two of the same alleles ex. YY or yy, BB or bb, AA or aa
Heterozygous - the trait has two different allelesex. Yy, Bb, Aa
*NOTICE* The CAPITAL letter always comes first
BUT we know there was a hiding green allele in F1 generation! What happened?!
Genotype - the pair of alleles in the DNAPhenotype - what we end up seeing in the organism
![Page 7: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/7.jpg)
![Page 8: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/8.jpg)
R R r r R r R r
RrRr
RrRr
RR Rr Rr rr
Rr
Rr
Rr
Rr
Punnett Squares
RR
Rr
Rr
rr
![Page 9: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/9.jpg)
Punnett squares are used to figure out the outcome of a cross-breeding event
Do we use Punnett squares for asexual or sexual mating?
What are the alleles we use to describea female? A male?
X X
X
Y
What are the chances we have a boy? A girl?
50% chance of a girl!50% chance of a boy!
XX XX
XY XY
![Page 10: Mendelian Genetics Day 2 AIM: How can we tell what traits an offspring will have? DO NOW: Worksheet (you have 5 minutes!) HOMEWORK: SpongeBob SquarePants.](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d485503460f94a22d6e/html5/thumbnails/10.jpg)
Summary
How can we tell what traits an offspring will have?Make sure to use the words allele, Punnett square,
genotype, and phenotype.
Discuss with your neighbor!
Homework: SpongeBob SquarePants Punnett Square worksheet!