Larkey Genetics
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Transcript Larkey Genetics
Larkey
Genetics
What happens in a Larkey
population?
From Genotype to Phenotype!
Decode
the genotype to produce the
Larkey’s phenotype!
Larkey Parents
Female Parent
Genotype
A
A
E
E
f
f
t
t
Male Parent
Genotype
a
a
e
e
F
F
T
T
Record their genotypes and draw the
phenotypes on the “Larkey Breeding Record.”
Larkey Genetics
The
parent Larkeys will produce a male
and female Larkey.
Record
their genotypes and draw the
phenotypes on the “Larkey Breeding
Record.”
F1 Generation Results
Genotypes
= Aa, Ee, Ff, and Tt
Phenotypes = short legs, red eyes, solid
fur, bushy tails
All
offspring will have the same
genotypes, and therefore, the same
phenotypes. Why?
Types of Alleles
homozygous
alleles = both parents started
with genotypes that had identical alleles,
so there is little diversity; homozygous
may be two dominant or two recessive
alleles; AA, aa, EE, ee, etc.
heterozygous alleles = genes with one
dominant allele and one recessive allele;
Aa, Ee, etc.
Punnett Squares
This
is a simple graphical way of
discovering all of the potential
combinations of genotypes that can
occur in children, given the genotypes of
their parents.
It also shows us the odds of each of the
offspring genotypes occurring.
Immigrant Male
Now,
an immigrant male produces a son
and a daughter with the female.
This will increase diversity!
F2 Generation Genotypes
Female
Genotype
A
a
E
e
F
f
T
t
Immigrant Male
Genotype
A
A
E
E
F
f
t
t
F2 Generation Results-Male
Genotypes
= Aa, EE, FF, and Tt
Phenotypes =
As more Larkeys are introduced, the
genetic diversity will increase! This
creates a healthy population.
Record their genotypes and draw the
phenotypes on the “Larkey Breeding
Record.”
F2 Generation Results-Female
Genotypes = AA, EE, ff, and tt
Phenotypes = short legs, red eyes, spotted fur,
bare tail
As more Larkeys are introduced, the genetic
diversity will increase! This creates a healthy
population.
Record their genotypes and draw the
phenotypes on the “Larkey Breeding Record.”
Reading Assignment!
With
another person at your table group,
you will FINISH THIS ASSIGNMENT:
Partner read pages 46 through 55.
Under each green heading, you will write
down 2-3 things you learned in your
Science Notebook!
Finished Early? Come see me!