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.
Gametes are cells with only half the number of chromosomes as the organism. When two gametes fuse together, the number of chromosomes is correct, with half of those chromosomes (one from each pair) coming from the mother and the other half coming from the father.tep 2: Each of the two daughter cells is divided into two making four gametes. This step is called Meiosis II but it is really the same process as mitosis. Gametes only contain one copy of each gene, but the cell they were made from contained two varieties of each gene.