WBCS.LIVE practice question
What is the chromosome number in human ovum?
Solve this multiple-choice question and check the correct answer with its explanation below.
Answer options
Correct answer and explanation
Correct answer: 46
Explanation: The human ovum (egg cell) contains 23 chromosomes, which combine with 23 from the sperm to make 46 in the zygote. 📚 Other Information: ▪️ Human body cells are diploid (2n = 46 chromosomes), while gametes (sex cells) are haploid (n = 23). ▪️ The ovum is the female gamete produced in the ovaries. ▪️ Fertilization restores the diploid chromosome number. ▪️ Out of 23 pairs, 22 are autosomes and 1 pair is sex chromosomes (XX or XY). ▪️ Chromosomes carry genes, the units of inheritance. ▪️ Abnormal chromosome number can cause disorders like Down’s syndrome. ▪️ Chromosome study is done through karyotyping. ▪️ Sex determination depends on the sperm’s chromosome - X or Y.