what factors besides reproduction could affect the genotype and allele frequency of a population?
DESCRIPTION
Question of the Day!. What factors besides reproduction could affect the genotype and allele frequency of a population?. Cartoons of the Day! 117 th Edition. Cartoons of the Day! 117 th Edition. Cartoons of the Day! 117 th Edition. Cartoons of the Day! 117 th Edition. - PowerPoint PPT PresentationTRANSCRIPT
Punnett Practice!
Cartoons of the Day!
Cartoons of the Day!
Cartoons of the Day!
Cartoons of the Day!
Problem #AW YEAH!
Three-fourths (3/4) of the plants produced by a cross between two unknown pea plants have axial flowers and ¼ have terminal flowers. What are the genotypes of the parent plants?
Parent genotypes:
Problem #10
What cross would result in ½ of the offspring having green pods and ½ of the offspring having yellow pods?
Cross:
Always: Homozygous dominant X anything = 100% dominant
offspring Heterozygote X homozygous recessive = 50% dominant
50% recessive Heterozygote X heterozygote = 75% dominant 25%
recessive Homozygous recessive X homozygous recessive = 100%
recessiveB B ?
b b B b B b
b B
b? b b
b
B? B?
B? B?
Bb bb
Bb bb
BB Bb Bb bb
bb bb
bb bb
Question of the Day! Analyze the data in at your table and draw 3
conclusions about the following:
1.) What factors are affecting the genotype frequencies?
2.) What factors are affecting the allele frequencies?
3.) If we were to mate 2 more rounds using the offspring from round 4 to start, predict the distribution of alleles. Support your prediction with the data.
INTRODUCING….DRUM ROLL!!!
DIHYBRID CROSSES!!!
Cartoon of the Day!
Clay’s clips of the day!
Cartoon of the Day!
Cartoon of the Day!
Try this one on your own!
In the deep rainforests of Brazil lives the Ocamazi tribe, amongst the members of this tribe exists a dominant trait for webbed feet (A), most have this trait, those that don’t have non-webbed feet (a). Additionally most members of this tribe webbed hands(B), a small minority have normal non-webbed fingers (b). Needless to say this tribe is great at swimming.
Problem: An Ocamazi princess Heterozygous for both webbed feet and fingers travels to another tribe to meet her soon to be husband, his tribe also has webbed feet which is also heterozygous for but no webbed hands which he is homozygous for. Draw the cross for the mating of these two people.
Solution Princess: FfWw Husband:
FfwwFFWw FFWw FfWw FfWw
FFww
FfWw
FFww
ffww
ffWw
Ffww
ffww
ffWw
Ffww
Ffww
Ffww
FfWw
FW
fwFw
Fw
fwFw
fW
fw
F-Webbed Feet, f-Non Webbed FeetW- Webbed hands, w-Non Webbed hands
Interpret this data!
Challenge Problem You are a world-famous breeder of Purple-
People Eaters. Tragically, your entire stock perishes in a fire except for two individuals. They are both heterozygous for all three traits desired. The three traits are as follows:
Traits
EE or Ee=Two eyes ee= One eye HH or Hh= Two horns hh= One horn FF or Ff= Non-flying ff= Flying
Powerpoint Quiz 1
1.) What did Mendel contribute to the field of Genetics?
2.) Explain the difference between phenotype and genotype.
3.)Give an example of an ‘allele.’
4.)Give an example of a recessive allele Mendel discovered in the pea plants.
5.) What does it mean to be ‘Heterozygous’ for a given trait?
Punnet Square
Created by PunnetUsed to predict possible outcomes of crosses
Problem #1 (together)
Nn x NN
Genotype ratio: Phenotype ratio:
Problem #2
Aa x aa
Genotype ratio: Phenotype ratio:
Problem #3 (on your own) Tt x Tt
Genotype ratio: Phenotype ratio:
Problem #4
Cross two plants that are heterozygous for green pods
Genotype ratio: Phenotype ratio:
Punnett Genetics
Mr. NicholsPHHS
Powerpoint Quiz 1
1.) What did Mendel contribute to the field of Genetics?
2.) Explain the difference between phenotype and genotype.
3.)Give an example of an ‘allele.’
4.)Give an example of a recessive allele Mendel discovered in the pea plants.
5.) What does it mean to be ‘Heterozygous’ for a given trait?
Punnet Square
Created by PunnetUsed to predict possible outcomes of crosses
Problem #1 (together)
Nn x NN
Genotype ratio: Phenotype ratio:
Problem #2
Aa x aa
Genotype ratio: Phenotype ratio:
Problem #3 (on your own) Tt x Tt
Genotype ratio: Phenotype ratio:
Problem #4
Cross two plants that are heterozygous for green pods
Genotype ratio: Phenotype ratio:
Friendly Competition
The first student to write all of the different options for Punnett squares gets 10 bio bucks!
Cartoons of the Day
Cartoons of the Day
Cartoons of the Day
Cartoons of the Day
Cartoons of the Day
Cartoon of the Day!
Problem #5
Cross a plant that is heterozygous for axial flowers with a plant that has terminal flowers.
Genotype ratio: Phenotype ratio:
Problem #6
Cross a homozygous tall plant with a short plant.
Genotype ratio: Phenotype ratio:
Problem #7
Cross a plant that is heterozygous for smooth pods with a plant that had constricted pods.
Genotype ratio: Phenotype ratio:
Problem #8
When a tall plant is crossed with a short plant, some of the offspring are short. What are the genotypes of the parents and the offspring? What is the phenotypic ratio in the offspring?
Parent genotypes: Offspring genotypes: Phenotypic ratio:
WELCOME BACK!!! “PREPARE THY SELVES FOR MORTAL
COMBAT……INVOLVING BIO BUCKS AND CAPITAL LETTERS, AHHHHHHH!!!!”
-Mr. Nichols
A.K.A: Get some paper and a pencil ready.
Punnett Genetics
Mr. NicholsPHHS