4. Which of the following is an inheritance pattern where a heterozygous organism shows a trait intermediate between
the parental traits?
A. Sex limited determination
B. Incomplete dominance
C. Sex influenced traits
D. Sex-linked traits
3. Among humans, blood type is controlled by multiple alleles A, B and O. Which of the following gene pairs shows blood
type A?
A. AA and AO
B. AO and AB
C. AB and AA
D. AA, AO and AB
12. It is an inheritance pattern where a heterozygous organism exhibits both of the parental traits.
A. Incomplete dominance
B. Non-Mendelian
C. Codominance
D. Mendelian
8. What is the genotype of blood type AB?
A. I A I B
B. I A i B
C. i A i B
D. i A I B
2. A chestnut brown horse mates with a creamy white one and all offspring are palominos. Coat color among horses
exhibits which of the following?
A. Incomplete dominance
B. Sex influenced trait
C. Multiple alleles
D. Codominance
Problem: Among four o’clock plants, R is the allele for red flowers and W is the allele for white flowers. With a Punnet
square, show the cross between a homozygous red and a homozygous white flower. What are the genotypes of the
offspring? Show the cross between 2 heterozygous flowers using a Punnett square and identify the phenotypic and
genotypic ratios.
W
W
R
RW RW
R
RW RW
Genotype: RW
R
W
R
RR
RW
W
RW WW
GENOTYPIC RATIO: 2 RW: 1 RR: 1WW
PHENOTYPIC RATIO: 2 pink: 1 red: 1 white