Left bundle branch block is a problem with the heartâs electrical wiring system. Your heart has 4 chambers. The 2 upper chambers are called atria, and the 2 lower chambers are called ventricles.
The process of sexual reproduction involves two parents, each contributing one gamete. Gametes are produced. by a process called meiosis, which starts by the duplication of the chromosomes, followed by two rounds of cell divisions and halving of the chromosome number.Gametes have half the chromosome number of other adult. cells of an organism.A key feature of meiosis is the exchange of chromosome pieces which occurs in the first division of this process, called recombination or crossing over.ametes have half the chromosome number of other adult. cells of an organism. A key feature of meiosis is the exchange of chromosome pieces which occurs in the first division of this process, called recombination or crossing over.
In this a small growth occurs on parent body which develops into new individual. Sexual Reproduction started from protists. In this there is formation of gamete. Along with this meiosis occurs which reduces the chromosome number.It leads to formation of zygote along with fusion of gametes referred as Fertilization. Syngamy and Conjugation are two methods of sexual reproduction.n this a small growth occurs on parent body which develops into new individual. Sexual Reproduction started from protists. In this there is formation of gamete. Along with this meiosis occurs which reduces the chromosome number.