Question

Number of autosomes present in the ovum cells of a human female is

• A. double the number of allosomes of sperms
• B. half the number of autosomes when compared to a heart cell
• C. half the number of total chromosomes of nephrons
• D. the same number of chromosomes as in the germinal epithelium of an ovary

Answer 1

The correct option is B half the number of autosomes when compared to a heart cell

Any of the numbered chromosomes (except sex chromosomes called allosomes) is called autosome. Numbers have been assigned to these autosomes roughly based on their sizes. In humans, the number of autosomes present in all somatic cells (such as heart cells, nephrons, germinal epithelium of an ovary, etc) is the same regardless of gender. They have 22 pairs (44) of autosomes and 1 pair (2) of allosomes.
While gametic cells such as ovum and sperms have only 22 autosomes and 1 allosome each.
Half the number of total autosomes of the heart will be 22 chromosomes which is equal to the number of autosomes present in ovum cells of human females.
The number of allosomes (sex chromosomes) of sperms, when doubled, will be 2. Half of the total chromosomes of nephrons will be 23 as the total chromosome number in nephrons is 46.
The germinal epithelium of the ovary will have 46 chromosomes.