Question

In the hexaploid wheat, the haploid ($n$) and basic ($x$) numbers of chromosomes are

• A. $n=21$ and $x=21$
• B. $n=21$ and $x=14$
• C. $n=21$ and $x=7$
• D. $n=7$ and $x=21$

Answer 1

Answer: (C)

$n=21$ and $x=7$

Ploidy level is the number of complete sets of chromosomes in a cell. Wheat is hexaploid which is denoted as 6x and has 42 chromosomes, here ' x' is the basic number of chromosomes, they are the different chromosomes which makes up a single complete set of chromosomes which is 7 in case of wheat while ' n ' is referred to as the haploid number of chromosomes i.e; half the total number of chromosomes which is 21 in wheat .

So , correct option is ' n = 21 and x = 7 ' .