Question

What happens when two haploid gametes join to form a zygote?

the zygote becomes haploid
the zygote immediately becomes an embryo
the zygote immediately becomes a fetus

the zygote becomes diploid

Answer 1

When two haploid gametes, such as a sperm and an oocyte, combine, they form a diploid zygote. This is the first step in the development of a new multicellular organism.

Step-by-step explanation:

When two haploid gametes join during fertilization, they form a zygote. This zygote is diploid, meaning it has two complete sets of chromosomes, one from each parent. The process begins with the formation of a haploid secondary oocyte, which can only complete meiosis II and become an ovum if a sperm cell penetrates it. Upon fertilization by the sperm, the ovum rapidly transitions from being a haploid cell to becoming the first diploid cell of the offspring. The zygote then undergoes numerous rounds of mitosis, leading to the development of a multicellular organism.

Answer 2

forms a diploid zygote.

Step-by-step explanation:

Fertilization joins two haploid gametes into a diploid zygote, the first cell of a new organism. The zygote enters G1 of the first cell cycle, and the organism begins to grow and develop through mitosis and cell division.