TEST I
Given that B is for bent little finger and b is for straight little finger while N is for
nearsightedness and n is for normal vision.
1. What is the phenotype of the mother having BbNn genotype?
2. Give the phenotype of the father having bbNN genotype.
3. Give the possible genotype of the offspring from the couple.
4. What are the possible phenotypes of the offspring of the couple?
5. Is there a possibility that a child with a straight little finger and normal vision is
to produce from the couple?
TEST II
Direction: Choose the letter of the BEST answer.
1. What Mendelian principle states that in a heterozygous gene pair, the dominant
trait will mask the recessive trait?
a. Dominance
c. Codominance
b. Segregation
d. Independent Assortment
2. Given that (A) is for axial flower position and (a) is for terminal flower position. What
is the phenotype of an organism having Aa genotype?
a. Axial
c. Both axial and terminal
b. Terminal
d. None of the above
3. Tall stem length (T) is dominant over dwarf stem length (t) in garden pea plants.
What is the phenotypic ratio from the cross Tt x Tt?
a. 3 tall: 1 dwarf
c. 1 tall: 3 dwarf
b. 2 tall: 2 dwarf
d. 0 tall: 4 dwarf
4. If the heterozygous inflated pod garden pea plant is cross with constricted pod
garden pea plant, what are the chances of producing constricted garden pea plant?
a. 0%
c. 50%
b. 25%
d. 100%
5. Nearsightedness (N) is dominant over normal vision (n). What is the possibility that
a couple which is both nearsighted produces a child with normal vision?
a. None, because both parents are nearsighted
b. Possible if both parents have homozygous genotype for nearsightedness
c. Possible if both parents have heterozygous genotype for nearsightedness
d. Possible if one parent has homozygous genotype and the other has
heterozygous genotype for nearsightedness
