Mendelism - Advance

 

Mendelism - Advance

Dear Readers,

Compared to other sections, Botany is considered to be the most scoring section. If prepared thoroughly, Botany can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Normal maize has starchy seeds which remain smooth when dry. A mutant form has sugary seed which go rinckled when dry. When a mutant was crossed with a normal plant, an F1 was produced which had smooth seeds. What would be the relative ratios of the different seed types, if the F1 was allowed to self

•  1 smooth : 3 sugary
•  3 smooth : 1 sugary
•  1 smooth : 1 sugary
•  All sugary

3 smooth : 1 sugary

Q2. The resemblance of individuals to their progenitors is called

•  Heredity
•  Genetics
•  Evolution
•  None of these

Heredity

Q3. In an organism, pink spot is a sex-linked recessive trait and black hair heterozygous female is mated to a white male which is not spotted, the phenotypic ratio of the offspring would be

•  1/4 spotted black; 1/4 pink spotted white; 1/4 unspotted black; 1/4 unspotted white
•  1/2 pink spotted black; 1/2 pink spotted white
•  3/4 pink spotted black; 1/4 pink spotted white
•  3/4 unspotted black; 1/4 pink spotted white

1/4 spotted black; 1/4 pink spotted white; 1/4 unspotted black; 1/4 unspotted white

Q4. When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds, all the F1 plants have yellow seeds. This means that the allele for yellow is

•  Heterozygous
•  Dominant
•  Recessive
•  Lethal

Dominant

Q5. An organism with two identical alleles for a given trait is

•  Homozygous
•  Segregating
•  Dominant
•  A hermaphrodite

Homozygous

Q6. In one cross between red flower and white flower the offsprings have red flower in majority and white flowers are much less. In this cross red colour character is

•  Dominant
•  Assorted
•  Recessive
•  Hybrid

Dominant

Q7. Who out of the following was of the strong opinion that acquired characteristics are inherited

•  Lamarck
•  Lysenko
•  Mendel
•  Huxley

Lamarck

Q8. Maternal inheritance is due to the genes present

•  Lysosome
•  Nucleoplasm
•  Nucleus
•  Mitochondria

Mitochondria

Q9. A tobacco plant which is heterozygous for albinism (a recessive character) is self-pollinated if 1200 seeds are subsequently germinated, how many of the seedlings would have the parental genotype

•  300
•  600
•  900
•  1200

600

Q10. When both the members of a pair of alleles are identical in a plant, it is called

•  Heterozygote
•  Hybrid
•  Homozygote
•  Inbreeder of the above

Homozygote