An MRI takes pictures of basic brain structures. ï· In early Parkinsonâs disease (PD), MRI of the brain is usually normal so researchers use it to check to be sure there is no other neurological reason for a patientâs PD symptoms.
Gametes are produced by a type of cell division called meiosis. They are haploid, meaning that they contain only one set of chromosomes. When the haploid male and female gametes unite in a process called fertilization, they form what is called a zygote.The zygote is diploid and contains two sets of chromosomes.efinition: Gametes are reproductive cells (sex cells) that unite during sexual reproduction to form a new cell called a zygote. Male gametes are sperm and female gametes are ova (eggs). In seed bearing plants, p ollen is the male sperm producing gametophyte. Female gametes are contained within the plant ovary.
Gametogenesis is a process in which an organism makes its sex cells. When one gamete fuses with another, they create a complete set of DNA that serves as a blueprint for that organism. Females produce eggs, or oocytes, in the ovaries during a process known as oogenesis.View slideshow of images above.ametogenesis is a process in which an organism makes its sex cells. When one gamete fuses with another, they create a complete set of DNA that serves as a blueprint for that organism. Females produce eggs, or oocytes, in the ovaries during a process known as oogenesis. View slideshow of images above.