Download NAME

NAME_____________________Period______ Date__________
Integrated Science 2 Ch. 7 Blood Type & Other Patterns of Inheritance Problems
1. In a genetically engineered species of tulips, 5-flower petals (F) is dominant over 4-flower petals
(f). Cross two plants that are heterozygous for the trait. What is the phenotypic ratio of the
offspring?
Parent cross: ______ x ______
Phenotypic Ratio of offspring: ______ : ______
Punnett Square:
12. In carnations, flower color is an incompletely dominant trait. If a red flowered plant (RR) is crossed with a white
flowered plant (WW), what is the genotypic and phenotypic ratios of the offspring?
Parent cross: ______ x ______
Offspring genotypes:
_______%RR
_______%RW
_______%WW
Offspring phenotypes: _______%Red
_______% ___________ (fill in the blank with the heterozygous phenotype)
_______% White
Punnett Square:
12. In a species of chicken, feather color is a codominant trait. Heterozygotes (BW) are called “checkered” chickens
because they have both black and white feathers. If two checkered chickens are mated, what would their
offspring look like?
Parent cross: ______ x ______
Punnett Square:
Phenotypic Ratio of offspring: ______ Black(BB)
______ Checkered(BW)
______ White(WW)
4. In humans, hemophilia is a recessive sex-linked disorder that is carried on the X chromosome. The genotypes and
phenotypes are: XH = normal; Xh = hemophilia. A phenotypically normal woman has phenotypically normal parents.
However, she has a hemophiliac brother.
______ x ______
______ x ______
a. What are the genotypes of:
The normal woman _______
Punnett Square:
Punnett Square:
The woman’s parent’s _______ and _______
The woman’s brother _______
b. What are her chances of being a carrier for hemophilia?
c. If she is a carrier and marries a normal male,
what is the chance of a child being a hemophiliac?
12. A man is accused of fathering a child with type B blood. The mother of the child has type O blood. The man
has type AB blood. Could he be the child’s father?
Allele Key: Child:
Could he be the child’s father? YES
______ or ______
Punnett Square:
Mother:
______
Man:
______
Parent cross: ______ x ______
Type A:
Type B:
Type AB
Type O:
NO (circle one)
IA IA, IA i
IB IB, IB i
IA IB
ii
6. Sex-linked is a gene found only on sex chromosomes. X-linked traits are carried on the X chromosome. They are
usually recessive characteristics. Since females have two X’s, they rarely have these traits. A male has only one X
chromosome so the trait is expressed. Hemophilia and red-green colorblindness are examples of X-linked traits.
X or XA = normal
Xa = colorblind
State whether the following genotypes are normal, normal carriers, or colorblind
XA XA ________________
XA Xa ________________
XA Y__________________
Xa Y _________________
Xa Xa ________________
12. Show a cross between a colorblind female and a normal male. What percent of their offspring will be
colorblind?
Parent cross: ______ x ______
Punnett Square:
_______% Colorblind
12. Show a cross between a normal carrier female and a normal male. What percent of their offspring will be
colorblind? What percent of their offspring will be normal?
Parent cross: ______ x ______
Punnett Square:
_______% Colorblind
_______% Normal
9. What are the male and female gametes (sex cells)? Male: _________ Female: ________
10. If the diploid number of an organism is 84, what is its haploid number? ______
11. What is the term used to describe the physical appearance of an organism? ______________
12. What is the term used to describe the genetic make-up of an organism? _______________
EXTRA CREDIT CHALLENGE!
1. In a hospital three babies were born simultaneously during a thunderstorm. The lights went out for a few minutes, and
during that time the babies were mixed up. The hospital wants to be sure that it is giving the right baby to the right
parents by attempting to match the blood type.
Include genotypes for each parent and use Punnett squares (you will need to consider all possible genotypes) to
show your work:
McBride family = Type O and Type AB
Gonzales family = Type A and Type B
Smith family = Type A and Type O
McBride:
Parent cross: ______ x ______
Punnett Square:
Baby 1 = Type AB
Baby 2 = Type O
Baby 3 = Type B
Gonzales:
Smith:
Parent cross: ______ x ______
Parent cross: ______ x ______
Punnett Square:
Punnett Square:
Punnett Square:
Parent cross: ______ x ______ or
Parent cross: ______ x ______
Punnett Square:
Punnett Square:
Parent cross: ______ x ______
Punnett Square:
Parents
Blood Types
or Parent cross: ______ x ______
Baby
McBride’s
Gonzales’
Smith’s
2. In calico cats, hair color is X-linked. It is also a codominant characteristic. Cross a black cat and a calico cat
(XB = Black, XY = yellow, XB XY = calico). What is the ratio of male to female offspring? What are the phenotypes of the
offspring include sex and fur color.
Ratio of Male to Female
Parent cross: ______ x ______
Punnett Square:
_______ : _______
Can a male calico cat be produced?
Explain.
_________________________________
Offspring Phenotypes
Sex and Fur Color:
1. _________________
2. ________________
_______________________________
_________________________________
_______________________________
3. _________________
4. _________________