Why must mitosis occur before a cell divides? Before Mitosis This is becausemitosis produces two daughter cells identical to the parent cell; so the number of chromosomes in the parent and daughter cells must be the same. Mitosis produces two diploid cells from one diploid cell. Thus, chromosom...
What can cause chromosomal damage in a fetus? Chromosome abnormalities often happen due to one or more of these: Errors during dividing of sex cells (meiosis) Errors during dividing of other cells (mitosis) Exposure to substances that cause birth defects (teratogens) Which trisomy is fatal? The...
All three phases of oogenesis occur within the ovary.As you mentioned in your question, the primary oocyte goes into a dormant, or resting, phase during the first round of meiosis in prophase I. This phase is termed dictyate. Egg cells may remain in the dictyate phase for around fifty ...
Explain why mitosis can occur in a haploid cell, but meiosis can't. Describe how chromosomes determine the sex of a child. Explain why cellular reproduction is necessary for life. Explain the significance of the fact that gametes contain half of the chromosome complement of somatic cells. ...
Why must somatic cells divide? Why does synapsis occur in meiosis and not mitosis? Why does meiosis include two cell divisions instead of one? Why is it important to produce haploid cells during meiosis? Why are somatic body cells diploids?
If it wasn't for this layer of skin and its ability to remain in continuous mitosis, we would still have scrapes from kindergarten! Answer and Explanation: The skin cells that undergo mitosis continuously are the epidermis cells. Looking at a bisection of your skin, it is made of many laye...
Endocytosis refers to invagination of a small region of plasma membrane, forming an interacellular membrane-bound vesicle. It has been observed in many kinds of animal cells, where the plasma membrane is in direct contact with external medium. Endocytosi
Depending on population structure, the ratio of male to female gametes may be male-biased in Plasmodium, but because gametogenesis involves only three more rounds of mitosis for each male compared with each female, the opportunity for mu- tational bias to result in fast-male evolution...
Species of the Solanum type (potato type) exclude plastids after pollen mitosis I. Their generative cell contains a few plastids which, however, are selectively degraded (by an unknown mechanism) prior to division of the generative cell into the two sperm cells in pollen mitosis I...
ZIP4 is found to be upregulated in several types of cancer cells [53, 54, 58]. ZIP6 also plays an important role in numerous cancers, particularly breast cancer [47, 49, 56, 57, 71]. Overexpression of ZnT2 is found to decrease invasive phenotypes of breast cancer cells [72]. In ...