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.
Best Answer: First of all the process of Meiosis in the development of gametes for sexual reproduction inceases variation by producing genetically non identical gametes. Sexual reproduction occurs by random fusion of gametes also increasing variation.Meiosis is a type of division to produce haploid gametes for sexual reproduction and takes place in the seminifrous tubules in the testes of male (humans) and in the ovaries of females.In plants the male sex cell (pollen) is produced in the anthers and the female sex cells (ovules) takes place in the ovary.Meiosis I halves the number or chromosomes. (a reduction division) Meiosis II doubles the number of cells to give four haploid gametes.n plants the male sex cell (pollen) is produced in the anthers and the female sex cells (ovules) takes place in the ovary. Meiosis I halves the number or chromosomes. (a reduction division) Meiosis II doubles the number of cells to give four haploid gametes.