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PRE-TEST
Directions: Write the letter of the correct
answer.
1. If W = purple flower and w = white, and D = tall
plants and d = short plants, a wwDd plant would
be
a. purple & tall c. white & tall
b. purple & short d. white & short
2. What is the maximum number of allele that
monohybrid cross can consider?
a. 1 b. 2 c. 3 d. 4
3. If a true breeding tall pea plant is crossed with
a true breeding short pea plant, what will be the
phenotype of the F1 generation?
a. all short c. all tall
b. 3:1 short: tall d. 1:3 short: tall
4. What is expected phenotypic ratio obtained by crossing
the F1 generation in dihybrid cross would be?
a. 3:1
b. 1:2:1
c. 9:3:3:1
d. 1:2:1: 2:4:2: 1:2:1
5. Considering a dihybrid cross, what is the probability of
the progeny being heterozygous at both the alleles?
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