Ch. 3 MCQ Test 3

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Ch. 3 MCQ Test 3

This test is Based on
Ch. 3 Inheritance and Variation
3.3 Mendel's Laws of Dominance
All the Best.....

Name

1. In monohybrid and dihybrid crosses, the phenotypic characters are controlled by discrete units, called .................... *

1 point

A particles

B objects

C factors

D things

2. The law of dominance is used to explain- ( a) the expression of only one of the parental characters of a monohybrid cross in F1 and (b)the expression of both in F2. *

1 point

A only a is correct

B only b is correct

C both a and b are correct

D both a and b are incorrect

3. “When two homozygous individuals with one or more sets of contrasting characters are crossed, the alleles (characters) that appear in F1 are dominant and those which do not appear in F1 are recessive”. This states the.... *

1 point

A Law of Dominance

B Law of Segregation

C Law of Purity of Gametes

D Law of Independent Assortment

4. In a Mendelian cross, if a homozygous pea plant having round seeds is crossed with a homozygous pea plant having wrinkled seeds. What will be the genotype and phenotype of F1 progeny? *

1 point

A RR; All Round

B RR & rr; 50% Round and 50% Wrinkled

C Rr; All Round

D rr; All Wrinkled

5. In a Mendelian cross when a homozygous for one trait forms gametes, how many types of gametes are formed? *

1 point

A One

B Two

C Three

D Four

6. In a Mendelian cross, if a homozygous pea plant having round, yellow seeds is crossed with a homozygous pea plant having wrinkled, green seeds. What will be the genotype of F1 progeny? *

1 point

A RrYY

B RRYy

C RrYy

D Rryy

7. In a Mendelian cross, if a homozygous pea plant having round, yellow seeds is crossed with a homozygous pea plant having wrinkled, green seeds. What will be the phenotype of F1 progeny? *

1 point

A Round Yellow

B Round Green

C Wrinkled Yellow

D Wrinkled Green

8. In a Mendelian cross, a F1 hybrid pea plant having round, yellow seeds is allowed for self pollination. The gametes formed are......................... *

1 point

A RY, Ry, rY and ry

B RR, YY, rr and yy

C Ry, ry and rY

D RR, Rr and rr

9. In a Mendelian cross, if a homozygous pea plant having round, yellow seeds is crossed with a homozygous pea plant having wrinkled, green seeds. What will be the phenotypic ratio in F2 generation? *

1 point

A 1:2:1

B 3:1

C 1:2:2:4:1:2:1:2:1

D 9:3:3:1

10. In a Mendelian cross, if a homozygous pea plant having round, yellow seeds is crossed with a homozygous pea plant having wrinkled, green seeds. What will be the genotypic ratio in F2 generation? *

1 point

A 9:3:3:1

B 1:2:4:2:1

C 1:2:4:6:4:2:1

D 1:2:2:4:1:2:1:2:1

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