what type of inheritance do snapdragon flowers have? incomplete dominance
TRANSCRIPT
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What type of inheritance do snapdragon flowers have?
Incomplete dominance
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What is the genotype for a red snapdragon flower?
RR
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What is the genotype for a white snapdragon flower?
R’R’
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What is the genotype for a pink snapdragon flower?
RR’
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Show a cross between a red snapdragon and a white
snapdragon.
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R’
R’
R R
RR’ RR’
RR’ RR’
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Show a cross between a pink
snapdragon and a white snapdragon.
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R’
R’
R R’
RR’ R’R’
RR’ R’R’
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What are the genotype and phenotype ratios for a cross
between a red snapdragon and a pink snapdragon?
2:2:0
2:2:0R
R
R R’
RR RR’
RR RR’
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What are the genotype and phenotype ratios for a cross
between a pink snapdragon and a pink snapdragon?
1:2:1
1:2:1R
R’
R R’
RR RR’
RR’ R’R’
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What two types of non-mendelian inheritance is human blood type an
example of?
Multiple Alleles
Codominance
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Cross a man with AB blood and a woman with O blood.
What are the possible phenotypes of the offspring?
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O
O
A B
AO BO
AO BO
A and B
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Cross a man with homozygous A blood and woman with homozygous
B blood. What are the possible phenotypes
of the offspring?
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B
B
A A
AB AB
AB AB
AB
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Cross a man with heterozygous A blood and a woman with O blood.
What are the possible phenotypes of the offspring?
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O
O
A O
AO OO
AO OO
A and O
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Is it possible for a woman with type A blood to have a baby with type AB
blood?If it is possible, show the cross.
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B
A
AB
YES
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Is it possible for a woman with type O blood to have a baby with type AB
blood?If it is possible, show the cross.
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O
O
O O
O O
NO
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Is it possible for a woman with type O blood to have a baby with type A
blood?If it is possible, show the cross.
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O
O
A
AO
AO
YES
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Is it possible for a woman with type A blood to have a baby with type B
blood?If it is possible, show the cross.
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B
A O
AB BO
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Color shows codominant inheritance in a species of mice. Show a cross between a white mouse and a black
mouse.
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W
W
B B
BW BW
BW BW
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What are the genotype and phenotype ratios for a cross
between a black mouse and a spotted mouse?
2:2:0
2:2:0B
W
B B
BB BB
BW BW
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What are the genotype and phenotype ratios for a cross between two spotted mice?
1:2:1
1:2:1B
W
B W
BB BW
BW WW
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What are the genotype and phenotype ratios for a cross
between two white mice?
0:0:4
0:0:4W
W
W W
WW WW
WW WW
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What type of inheritance pattern is shown?
B
b
B b
BB Bb
Bb bb
Mendelian, or complete dominance
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What would the hybrid look like?
Shows dominant
trait
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What type of inheritance pattern is shown?
B
B’
B B’
BB BB’
BB’ B’B’
Incomplete dominance
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What would the hybrid look like?
Shows blend of parental traits
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What type of inheritance pattern is shown?
B
T
B T
BB BT
BT TT
Codominance
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What would the hybrid look like?
Both traits are expressed
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What type of inheritance do human eyes exhibit?
Polygenic Inheritance
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What type of inheritance does albinism exhibit?
Pleiotropy
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What type of inheritance does human height exhibit?
Polygenic Inheritance
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What type of inheritance does beard growth exhibit?
Sex Limited
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What type of inheritance does baldness exhibit?
Sex Influenced
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A woman who carries the trait for baldness would expect what percent of her sons to
express this trait?
It depends on dad! 50% would get the gene from her.
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?
?
B b
B? ?b
B? ?b
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Show a cross between a healthy male and a colorblind
female.
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XB
Y
Xb Xb
XBXb XBXb
XbY XbY
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Is it possible for a healthy man to have a child who has
hemophilia?
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XH
Y
Xh
XhY
YES
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Is it possible for a healthy, non carrier woman to have a child
who has hemophilia?
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Y
XH XH
XH XH
XHY XHY
NO
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Duchenne’s Muscular Dystrophy is passed down in
what inheritance pattern?
Sex Linked
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A carrier of sickle cell anemia has some blood cells that are normal (biconcave) shape and some that
are sickle shape. What type of inheritance is this an example of?
Codominance
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Gout is a disorder that results in painful joint swelling. If
present, it is 8 times as likely to be expressed in males as it
is in females. What type of inheritance pattern is this an
example of?
Sex Influenced
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A non-sex chromosome
Autosome
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Abominable snowmonsters can have blue hands, black hands or
yellow hands. If this trait is codominant, what color hands
would you expect if you crossed a yellow with a blue?
Blue and yellow
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A species of deer show incomplete dominance in their height. If a
medium deer was crossed with a short deer, how tall would the
offspring be?
50% short, 50% medium
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You have brown and white rabbits, grey and white rabbits and solid
brown rabbits. If this trait is codominant, how would you breed
solid white rabbits?
BW x GW
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This rose can be pink, peach or what you see in the picture below. What type of inheritance pattern is
this an example of?
Codominance
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Grizzly bear claws can be black, white or grey. What is the genotype
of the bear pictured below?
BB’
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Achondroplasia is the result of a
single gene which effects
many characteristics. It is an example of what type of
inheritance pattern?
pleiotropy
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Normally fruit flies have red eyes. Occasionally flies will have white
eyes. This almost exclusively occurs in males. What type of
inheritance does this most likely follow?
Sex linked
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Mom + Dad
= Baby
What type of
inheritance pattern
does this show?
Mendelian (complete
dominance) with blue
legs being recessive.