Post on 17-Jan-2016
What type of inheritance do snapdragon flowers have?
Incomplete dominance
What is the genotype for a red snapdragon flower?
RR
What is the genotype for a white snapdragon flower?
R’R’
What is the genotype for a pink snapdragon flower?
RR’
Show a cross between a red snapdragon and a white
snapdragon.
R’
R’
R R
RR’ RR’
RR’ RR’
Show a cross between a pink
snapdragon and a white snapdragon.
R’
R’
R R’
RR’ R’R’
RR’ R’R’
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’
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’
What two types of non-mendelian inheritance is human blood type an
example of?
Multiple Alleles
Codominance
Cross a man with AB blood and a woman with O blood.
What are the possible phenotypes of the offspring?
O
O
A B
AO BO
AO BO
A and B
Cross a man with homozygous A blood and woman with homozygous
B blood. What are the possible phenotypes
of the offspring?
B
B
A A
AB AB
AB AB
AB
Cross a man with heterozygous A blood and a woman with O blood.
What are the possible phenotypes of the offspring?
O
O
A O
AO OO
AO OO
A and O
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.
B
A
AB
YES
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.
O
O
O O
O O
NO
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.
O
O
A
AO
AO
YES
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.
B
A O
AB BO
Color shows codominant inheritance in a species of mice. Show a cross between a white mouse and a black
mouse.
W
W
B B
BW BW
BW BW
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
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
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
What type of inheritance pattern is shown?
B
b
B b
BB Bb
Bb bb
Mendelian, or complete dominance
What would the hybrid look like?
Shows dominant
trait
What type of inheritance pattern is shown?
B
B’
B B’
BB BB’
BB’ B’B’
Incomplete dominance
What would the hybrid look like?
Shows blend of parental traits
What type of inheritance pattern is shown?
B
T
B T
BB BT
BT TT
Codominance
What would the hybrid look like?
Both traits are expressed
What type of inheritance do human eyes exhibit?
Polygenic Inheritance
What type of inheritance does albinism exhibit?
Pleiotropy
What type of inheritance does human height exhibit?
Polygenic Inheritance
What type of inheritance does beard growth exhibit?
Sex Limited
What type of inheritance does baldness exhibit?
Sex Influenced
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.
?
?
B b
B? ?b
B? ?b
Show a cross between a healthy male and a colorblind
female.
XB
Y
Xb Xb
XBXb XBXb
XbY XbY
Is it possible for a healthy man to have a child who has
hemophilia?
XH
Y
Xh
XhY
YES
Is it possible for a healthy, non carrier woman to have a child
who has hemophilia?
Y
XH XH
XH XH
XHY XHY
NO
Duchenne’s Muscular Dystrophy is passed down in
what inheritance pattern?
Sex Linked
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
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
A non-sex chromosome
Autosome
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
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
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
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
Grizzly bear claws can be black, white or grey. What is the genotype
of the bear pictured below?
BB’
Achondroplasia is the result of a
single gene which effects
many characteristics. It is an example of what type of
inheritance pattern?
pleiotropy
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
Mom + Dad
= Baby
What type of
inheritance pattern
does this show?
Mendelian (complete
dominance) with blue
legs being recessive.