The genome of modern wheat [T. aestivum] is 6x chromosomes with a total of 42 chromosomes. If all the chromosomes are divided equally into 6 haploid sets, each haploid set will have x or B number of chromosomes.
According to the number of chromosomes, we can say that B represents 7 chromosomes.
Since, in meiosis, chromosomes are divided equally into gametes, this indicates that each haploid gamete will contain 7 chromosomes in modern wheat.