Mendel's Experiment

Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce progeny having round, yellow (RrYy) seeds. When plants are selfed, the progeny will have the following combination of characters

• (a) 15:1

• (b) 9:3:3:1

• (c) 9:3:4

• (d) 12:3:1

Which of the following scientist gave the principles of inheritance?

• (a) Mendel

• (b) Griffin

• (c) Johanssen

• (d) Watson and Crick

Which of the following is not correct-

• (a) For every hormone there is a gene.

• (b) For every protein there is a gene.

• (C) For production of every enzyme there is a gene.

• (d) For every molecule of fat there is a gene.

It a round green seeded pea plant (RRYY) is crossed with wrinkled yellow seeded pea plant (rr yy) the seeds to be produced in F1 generation will be.

• (a) Wrinkled and yellow

• (b) round and green

• (c) wrinkled and green

  
  

• (d) round and yellow.

The genetic constitution of an organism is called.

• (a) Genotype

• (b) phenotype

• (c) variation

  
  

• (d) gene.

Two pink colored flowers on crossing results in 1red, 2pink and 1white flower progeny. The nature of the cross is-

• (a) cross fertilization

• (b) self pollination

• (c) double fertilization

  
  

• (d) no fertilization

Genetics is the study of-

• (a) resemblances amongst individuals

• (b) heredity and environment

• (c) differences amongst individuals

• (d) Heredity and variations.

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as

• (a) TTWW

• (b) TTww

• (c) TtWW

• (d) TtWw

The maleness of a child is determined by

• (a) the X chromosome in the zygote

• (b) the Y chromosome in zygote

• (c) the cytoplasm of germ cell which determines the sex

• (d) sex is determined by chance

The number of pair (s) of sex chromosomes in the zygote of humans is

• (a) one

• (b) two

• (c) three

• (d) four