Tt Tall tt Short The answer is because Review from Objective 1 Which of the following depicts a dominant genotype tall dominant short recessive Tt Tall tt Short The answer is because ID: 602878
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Slide1
Which of the following depicts a dominant genotype? (tall – dominant, short – recessive)TtTallttShortThe answer is _______ because:
Review from Objective 1Slide2
Which of the following depicts a dominant genotype? (tall – dominant, short – recessive)TtTallttShortThe answer is _______ because:
AnswerSlide3
A woman is homozygous dominant for wavy hair, what would her genotype be?WWWwww
HOMOZYGOUS DOMINANT
HETEROZYGOUS
HOMOZYGOUS RECESSIVESlide4
A woman is homozygous dominant for wavy hair, what would her genotype be?WWWwww
HOMOZYGOUS DOMINANT
HETEROZYGOUS
HOMOZYGOUS RECESSIVESlide5
If T is dominant for tallness, and t is recessive for short. What phenotype would a woman have if she was homozygous recessive?Tall
tt
ShortSlide6
If T is dominant for tallness, and t is recessive for short. What phenotype would a woman have if she was homozygous recessive?Tall
tt
ShortSlide7
A man is heterozygous Tall and married a woman who was homozygous recessive short. What would be their genotypes?TT and ttTt and TT
Tt
and
ttTall and shortSlide8
A man is heterozygous Tall and married a woman who was homozygous recessive short. What would be their genotypes?TT and ttTt and TT
Tt
and
ttTall and shortSlide9
PUNNETT SQUARES!How to predict offspring using the monohybrid squaresSlide10
WHAT’S A PUNNETT SQUARE?A diagram used to show the probability of certain traits being passed on from one generation to the next.Developed by Reginald Punnett
WHAT IS PROBABILITY?
The likelihood of an event taking place (chance)
Can be expressed by a fraction (1/4) or a percent (25%) or a ratio (3:1)
Like flipping a coin!Slide11
MONOHYBRID PUNNETT SQUARELooking at ONE trait at a time.Gamete genotypes are on the top and left sidesOffspring possibilities are inside the squaresSlide12
STEPS FOR A MONOHYBRID:ONE TRAIT AT A TIME1. Figure out the genotypes
Rr
x
Rr for each parent.
2. First parent genotype
is written on top (male)
3. Second parent is written
on the left side (female)
4. Fill in the inner boxes
with the alleles that they
fall under.
R
r
R
r
R
r
R
r
R
RR
Rr
r
Rr
rrSlide13
5. Monohybrid Results
Genotypes & Phenotypes
Genotype Fraction-
¼ BB, ½ Bb, ¼ bb
Phenotype Fraction-
¾ Big eyes, ¼ Small eyes
Genotype Percent-
25% BB, 50% Bb, 25% bb
Phenotype Percent-
75% Big Eyes, 25% Small eyes
Genotype Ratio-
1:2:1 (BB:Bb:bb)
Phenotype Ratio-
3:1 (Big:Small)Slide14
Practice 1: Male: Gg Female: Gg
G= Green
g= yellow
Genotype Fraction: ____________ Phenotype Fraction: ____________
Genotype %: _________________ Phenotype %:_________________
Genotype Ratio: ______________ Phenotype Ratio: ______________
G g
G g
GG
Gg
Gg
gg
¼ GG, ½
Gg
, ¼
gg
¾ green,
¼ yellow
25% GG, 50%
Gg
, 25%
gg
75% green,
25% yellow
1:2:1 (
GG:Gg:gg
)
3:1 (
green:yellow
)Slide15
Practice 2: Male: Gg Female: g
g
G= Green
g= yellow
Genotype Fraction: ____________ Phenotype Fraction: ____________
Genotype %: _________________ Phenotype %:_________________
Genotype Ratio: ______________ Phenotype Ratio: ______________
G g
g g
Gg
gg
Gg
gg
½
Gg
, ½
gg
½ green,
½ yellow
50%
Gg
, 50%
gg
,
50% green,
50% yellow
1:1 (
Gg:gg
)
1:1 (
green:yellow
)Slide16
Check yourselfWhich statement best explains the fact that some identical twins appear different from one another?Their DNA is essentially the same and the environment plays little or no role in the expression of their genesTheir DNA is very different and the environment plays a significant role in the expression of their genes
Their DNA is very different and the environment plays little or no role in the expression of their genes.
Their DNA is essentially the same and the environment plays a significant role in the expression of their genes.
The answer is ________ because:Slide17
Check yourselfWhich statement best explains the fact that some identical twins appear different from one another?Their DNA is essentially the same and the environment plays little or no role in the expression of their genesTheir DNA is very different and the environment plays a significant role in the expression of their genes
Their DNA is very different and the environment plays little or no role in the expression of their genes.
Their DNA is essentially the same and the environment plays a significant role in the expression of their genes.
The answer is ________ because: