A zygote is a fertilized egg, the result of when an egg cell and a sperm cell combine. The process takes about 24 hours, and it marks the start of pregnancy. The zygote is just one cell to start with, but that cell contains all of the genetic material (DNA) the baby needs: 23 ch...
The female gamete contributed by the mother during reproduction is called the egg cell (also known as the ovum or secondary oocyte). It contains half of the genetic information (i.e., 23 individual human chromosomes) that will combine with the other half of the genetic information carried by...
Where does fertilization of an egg cell usually occur? What is the name of cells that undergo meiosis? What types of cells have chromosomes? Which cell would contain a single copy of each of the human body's 23 chromosomes? The male gamete is called ___. What is the difference between...
A spermatozoon is the male sex cell orgametethat fertilizes the female egg orovumin organisms that reproduce sexually, including all animals and some plants. Unlike most of the cells that make up multicellular organisms, spermatozoa consist of a head and at least one flagellum or tail, which a...
The structure of these cells includes a head that contains enzymes designed to help the cell penetrate the egg. While the human egg is very small, male gametes are even smaller, and the outer wall of the egg is essentially an impenetrable wall without enzymes to help the cells wriggle their...
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What is the outcome when a cell undergoes meiosis? Which event takes place during meiosis ii? a) When do mitosis and meiosis occur? Does meiosis occur when the sperm fuses with the egg? b) Explain what is spermatogenesis and oogenesis. ...
Gamete production in relation to adult body size was quantified in Trichogramma euproctidis (Girault) (Hymenoptera: Trichogrammatidae), a short-lived egg parasitoid of lepidopteran species. To avoid host quality variation, male and female parasitoids of different body sizes were produced using super...
There are two types of reproductive organs found in a gametophyte: Archegonium: A multicellular sex organ in the female that creates eggs. It is like an ovary in females because both structures form haploid cells of the egg. Antheridium: A Multicellular sex organ in the male that produces sp...
What part of the cell divides during meiosis? What do sex chromosomes do in somatic cells? In the diploid stage, how are there gametes when there is only one set of chromosomes (n)? What types of cells have chromosomes? Are diploid cells formed when a sperm fertilizes an egg?