There are two sets of chromosomes in a zygote.
A. True
B. False
Hint: A zygote is a eukaryotic cell created by the fusion of male and female gametes during fertilization. This cell plays a crucial role in ensuring the survival and continuity of the species.
Complete answer:
The zygote’s genome is a combination of genetic material from both male and female gametes, containing all the hereditary information from both parents to form a new organism. In multicellular organisms, the zygote represents the earliest developmental phase, while in single-celled organisms, the zygote reproduces asexually through mitosis, resulting in identical offspring. The mother’s gametes carry X chromosomes, while the father’s sperm carries either an X or a Y chromosome, determining the individual’s sex. If an X-bearing sperm fuses with the ovum’s X chromosome, a female is formed. A male results from the fusion of a Y-bearing sperm with an X chromosome from the ovum. During fertilization, the male and female gametes unite to form a zygote, which contains two sets of 23 chromosomes to make the necessary 46 chromosomes in humans (and the equivalent chromosome count in other species).
Therefore, the correct answer is Option (A).
Note: In a zygote, numerous mitotic divisions take place to develop into a multicellular organism. This stage follows fertilization. The zygote implants itself in the mother’s uterus, where it eventually progresses into an embryo during later stages of development.