Question

Which one of the following generates new genetic combinations leading to mutations?
A. Sexual reproduction
B. Nuclear polyembryony
C. Vegetative reproduction
D. Parthenogenesis

Answer 1

Hint: Sexual reproduction is the propagation which is brought about by the combination of gametes. The male and female gametes wire to shape the zygote. Because of the combination of gametes the result of sexual multiplication for the most part produces new hereditary mixes prompting varieties.

Complete answer:
• The living being is created from the zygote which has characters of both the guardians.
• The genome of the posterity is shaped by the recombination of hereditary material so they are otherwise called recombinants.
• The recombination may cause the abrupt heritable change in the genetic stock which causes transformations.
• In the creation of sex cells in eukaryotes, diploid mother cells gap to deliver haploid cells known as gametes in a cycle considered meiosis that includes hereditary recombination.
• The homologous chromosomes pair up so their DNA arrangements are lined up with one another, and this is trailed by trade of hereditary data between them.
• Two rounds of cell division at that point produce four haploid gametes, each with a large portion of the quantity of chromosomes from each parent cell, yet with the hereditary data in the parental chromosomes recombined.
• Two haploid gametes join into one diploid cell known as a zygote in a cycle called treatment. The zygote fuses hereditary material from the two gametes.

Hence, the correct answer is option (A).

Note: Before the coming of sexual propagation, the variation cycle whereby qualities would change starting with one age then onto the next (hereditary transformation) happened gradually and arbitrarily. Sex developed as an incredibly proficient component for creating variety, and this had the significant preferred position of empowering creatures to adjust to changing conditions.