These cells are our sex cells – sperm in males, eggs in females. During meiosis one cell?divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes?of the parent cell – they are haploid. Meiosis produces our sex cells or gametes?(eggs ...
A) During mitosis, the chromosomes are replicated, is the cell still diploid? B) After meiosis, the gametes only have 1/4 number of DNA, why is it haploid? Why don't chromosomes pair up in mitosis? Discuss why mitosis and meiosis are both types of cell division necessary for survi...
These haploid cells differentiate into gametes which when fused with another gamete make a diploid zygote, the progenitor of an organism. In higher organisms, cells specialised to undergo meiosis are germ cells. In several single-celled organisms too meiosis takes place. Essentially the process is ...
This is a result of asymmetric segregation of the X chromosome in male meiosis II, which gives rise to XX sperm. As a result, either one or two paternally-derived X chromosomes are eliminated from the embryo, which initiates female (XX) or male (X0) development, respectively (Fig. 1B)...
Explain why the process of meiosis is important for sexual reproduction and the continued diversity of life on earth. For each 23 pairs of chromosomes, the haploid egg cell will have either a maternal or paternal chromosome, but it c...
Gametes areproduced by mitosis(not meiosis) and after fertilization a diploid zygote is created. ... It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body. What are the symptoms when sperm meets egg?
describe meiosis and contrast it with mitosis define what a gamete is and tell why it must be haploid identify Mendel’s role in the history of genetics define key terms of genetics: gene, trait, allele, homozygous, heterozygous, dominant, codominant, recessive, genotype, phenotype, carrier, mu...
H. et al. Meiosis drives extraordinary genome plasticity in the haploid fungal plant pathogen Mycosphaerella graminicola. PLoS ONE 4, e5863 (2009). Article CAS PubMed PubMed Central Google Scholar Han, Y., Liu, X., Benny, U., Kistler, H. C. & VanEtten, H. D. Genes determining ...
The problem with these spores is that they are formed from multinuclear hyphae and yield a multinuclear spore – without a single nucleus stage, how can traditional meiosis function? It turns out that this problem is not unique to Glomeromycotina; it is also shared by their relatives in the...
A) During mitosis, the chromosomes are replicated, is the cell still diploid? B) After meiosis, the gametes only have 1/4 number of DNA, why is it haploid? What kind of cells have 46 chromosomes with 23 pairs? Why are individual chromosomes more difficult to see during interphase than du...