homozygous dominant white color x homozygous recessive purple color (3pts)W
W
w/ww/ww
50% homozygus recessive
purple
25% homozygus Dominant
25% hetrozygus recessive
w/ Wwl ww
W
W W
www
www
W
ww
ww
ww
two heterozygote white flowers (3pts)
a heterozygote white x homozygous white individual (3pts)
W
W
Ww
/۱۰
www Ww
50% hetro white
Ww
50% homo white
100% hefrozygote white
flower
100% white flower
ww
2011
100% white
3
7
-ho is colorblind (an X-linked recessive trait) marries a woman who is a carrier for the disease, but has
sion. What are the possible children if these two were to have a baby? (3pts)
75% the baby will be colorblind.
23/01to the following questions. SHOW ALL WORK!!! Good Luck!
1. White flower color (W) is dominant and purple flower color (w) is recessive. A flower that is homozygous
dominant for a white color is crossed with a flower that is homozygous recessive for purple color.
For each of the following, draw a Punnett square and give both the genotype and phenotype of the
offspring produced
a.
b.
C.
homozygous dominant white color x homozygous recessive purple color (3pts)
W
W
wwwww
w/ Ww
3
W
W ww
www
ww
www.
W
ww
ww
50% homozygus recessive
purple
25% homozygus Dominant
25% hetrozygus recessive
two heterozygote white flowers (3pts)
ww
100% hefrozygote white
flower
a heterozygote white x homozygous white individual (3pts)
W
W
Ww
TE book
www Ww
50% hetry white
Ww
50% homo white 300
100% white
100% white flower.
2. A male who is colorblind (an X-linked recessive trait) marries a woman who is a carrier for the disease, but has
normal vision. What are the possible children if these two were to have a baby? (3pts)
75% the baby will be colorblind.3. In mice, the ability to run normally is a dominant trait. Mice with this trait are called running mice (R). The
recessive trait causes mice to run in circles only. Mice with this trait are called waltzing mice (r). Hair color is
also inherited in mice. Black is dominant (B) over brown hair (b).
a. A waltzing, heterozygous black mouse with a homozygous running, brown mouse (4 pts)
Br
X Rb
R
Rr
Bb Rb
r Br
R
B..
rRr | Rr
r Br Br
2
showork
25% hetro
25% black walzing
running
brown gard
1903 25% running brown
25% black running
ips
b. (EXTRA CREDIT!) A heterozygous running heterozygous black mouse with a waltzing brown mouse
(4 pts EXTRA CREDIT)
Dr x Br
50%
200/50%
10%
running
black
waltzing brown
4. A female who is type AB blood marries a male who is Type O blood. What are the possible blood types for the
children of these two? (3pts)
The possible blood types are A or B.
5. Are males or females most likely to receive an X linked recessive disease? Why? (2pts)
Males, because moles only have one X
can
Cause
Chromosome which
the disease,6. What does it mean to say that a trait is multifactorial? State an example in your explanation. (3pts)
Means
M
“many factors” and are involved
with
a
birth
OF inhented factors.
defect / caused by a combination
ex heart disease, diabetes
7. Mendel is known as the “Father of Genetics” mainly for his work with the pea plant. Give 4 reasons the pea
plant was a good organism to test. (4pts)
a vapid reproduction v
self fertilization
b.
C.
d.
Macbook FI
life span
ND
casy planys to maintain
shorter
8. In humans, albinism is a recessive trait. The disorder causes a lack of pigment in the skin and hair, making an
albino appear very pale with white hair and pale blue eyes. The pedigree below traces the inheritance of the
allele that causes albinism. Albinism is noted by a darkened shape. Answer the following questions:
a. Given the following genotypes, describe the phenotypes (normal or albino) (3pts)
AA: Normal
Aa: Normal
Albino
aa:
b. Fill out the blanks on the pedigree with the genotypes of the family members: (5pts)
Laa
Aq9. In some cattle the genes for brown hair (B) and for white hair (W) are co-dominant. Cattle with alleles for both
brown and white hair, have both brown and white hairs. This condition gives the cattle half brown and half
white hair and is referred to as Roan (BW).
For each of the following construct a Punnett square and give phenotypic and genotype ratios of the
offspring.
a) a roan cow and a white bull (3pts)
W
WWWBW
W/BW BW
BW x WW
b) a brown cow and a roan bull (3pts)
B
B/BB BB
W/BW/BW/
75% yaan cow
25% white bull
BB X BW
ning
xeron po
50% roan bull
50% Brown Cow
10. Three babies were mixed up in a hospital. After consideration of the data below, which baby belongs to the
correct couple? Explain your reasoning with work. (6pts)
oll towany sqarle booguit
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