Is a primary spermatocyte haploid or diploid?

Is a secondary spermatocyte haploid or diploid?

Is a speratogonium haploid or diploid?

Is a spermatid haploid or diploid?

Lethal genes are much less common in haploid organisms than in diploids because: (A) haploids are usually smaller than the diploids (B) there are more diploids around us than these are haploids (C) in haploids, a gene is expressed even in a single dose (D) of the occurrence of irregular meiosis in haploids

Which are the techniques used for Haploid plant identification obtained through Anther culture of Rice?