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Indicating the name and respective ploidy of each involved cell how can the formation of sperm cells from germ cells be described?
The formation of sperm cells, or spermatogenesis, begins with a germ cell called as spermatogonium (2n) that suffers mitosis and gives birth to the spermatocyte I (2n). The spermatocyte I undergoes meiosis I and produces two spermatocyte II (n) that then undergo meiosis II and make four spermatids (n). Each spermatid undergoes a maturation process known as spermiogenesis and four sperm cells appear.
Explain Nutrient needs and Recommended Dietary Allowances? For infants and preschoolers, satisfactory growth is a sensitive criterion of whether needs are met. 50 th percentil
Pathphysiology Streptococcal upper respiratory infection leads to production of antibodies. An abnormal immunological response to the upper respiratory infection with Beta- h
Researchers (Helle et al., 2004) analyzed rates of twin births in the Sami population of Northern Scandinavia during the eighteenth and nineteenth centuries. They found that (1) a
how to classify the plants ?
What are the affinities of pteridophytes with gymnosperms?
what protist changes shape constantly and flows around its food to engulf it?
Are sperms being attacked by the body since they are foreign?
NUMBER Benden and Boveri first indicated that number of Chromosomes is definite in each organism. (1) Haploid (n) - One set of Chromosomes. i.e. one Chromosome of each
Septa prevent oxygenated and deoxygenated blood. Give reason
The three charges in the figure below are at the vertices of an isosceles triangle. Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.
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