Which one of the following pair is correctly matched

  • A

    Van Helmont$⇒$Discovered mutations

  • B

    Louis Pasteur$⇒$Wrote "The Origin of Species''

  • C

    T.H. Morgan$⇒$Studied sex-linked inheritance

  • D

    H. Khorana$⇒$Studied $DNA$ replication

Similar Questions

In a test cross involving $F_1$ dihybrid flies, more parental­type offspring were produced than the recombinant­type offspring. This indicates

  • [NEET 2016]

Frequency of crossing over in a chromosome is an index of

Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their $F_{1}$ progeny. He observed that

$(a)$ $F_{2}$ ratio was deviated very significantly from the $9 : 3 : 3 : 1$ ratio

$(b)$ Both genes did not segregate independently of each other

$(c)$ Recombinant types are not obtained in $F_{2}$ generation

$(d)$ Both genes segregate independently of each other

Select the correct set of statements :

Crossing over is

Gene can be defined as