Download a specific characteristic such as color or height - Room N-60

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
page
7
page
8
page
9
page
10
page
11
page
12
page
13
page
14
page
15
page
16
page
17
page
18
page
19
page
20
page
21
Document related concepts
no text concepts found
Transcript 
Gregor Mendel is
the father of
modern genetics.
For 14 years he
studied the
inherited
characteristics of
garden peas.
Mendel picked
common garden pea
plants because they
can be grown easily in
large numbers and
their reproduction can
be manipulated.
Flowers of pea plants
have both male and
female reproductive
organs.
Mendel chose 7 traits
to study.
Trait- a specific
characteristic such as
color or height.
Mendel chose 7 traits.
Trait- a specific
characteristic such as
color or height.
Traits are determined
by inherited genes
Genes have different
forms called alleles
Ex. For height:
Allele for tall
Allele for short
Dominant Allele – the
trait that is always
exhibited if allele is
present
Dominant Allele – the
trait that is always
exhibited if allele is
present
Recessive allele – the
trait that is only
exhibited if dominant
allele is not present
Traits Mendel studied
Dominant
Recessive
Traits Mendel studied
Dominant
Recessive
Trait
Dominant
Recessive
Seed Form
Round (R)
Wrinkled ( r)
Seed Color
Yellow (Y)
Green (y)
Pod form
Inflated (V)
Restricted (v)
Pod color
Green (G)
Yellow (g)
Flower Position
Axial (F)
Terminal (f)
Seed Coat Color
Gray (A)
White (a)
Stem Length
Tall (T)
Short (t)
Each plant has two
alleles for each trait –
One from each parent
Each plant has two
alleles for each trait –
One from each parent
Homozygous – the
alleles are the same
form. (Ex: TT or tt)
Each plant has two
alleles for each trait –
One from each parent
Homozygous – the
alleles are the same
form. (Ex: TT or tt)
Heterozygous – the
alleles are a different
form ( Ex: Tt)
Genotype: What allele
forms are present.
Ex: TT, Tt, tt
Phenotype: What
does it look like?
Ex: Tall or short?
Phenotype
Ex: Tall or short?
TT – Tall
tt - short
Tt - Tall
Allele combinations can be
determined by Punnett squares
Example: Flower color
Purple (P) is dominant
White (p) is recessive
Using a Punnett Square
White
Flower
Parent
(pp)
Purple
Flower
Parent
(PP)
P
p
p
Pp
Pp
P
Pp
Pp
Cross heterozygotes – Flower color
Cross heterozygote with homozygous recessive
Related documents