backcross

The backcross between a heterozygous (monohybrid) red flower plant (Rr) and a homozygous recessive white flower plant (rr) would produce a ratio of 1Rr:1rr. So you would expect half of the offspring to be red (Rr) and half the offspring to be white (rr).

A backcross is the act of crossing a hybrid plant or animal with one of its parents. It can also refer to a technique in juggling where a ball is thrown and caught behind the back.

Genomic In Situ Hybridization refers to use of total genomic DNA from one species as a probe for in situ hybridization to identify chromosomes, chromosome segments, or whole genomes originating from that species in a hybrid or backcross.

In cotton genetic male sterility is governed by recessive gene. It is transferred by back cross method of conventional plant breeding. After each backcross F1 is selfed to raise the F2 population in which you will get 50% fertile & 50% sterile population. Generally 5-6 backcrosses are needed.