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Oogenesis
Oogenesis is the formation of ovum from oogonial cells that are formed in the ovary from primordial germ cells. And as in spermatogenesis it involves meiosis to produce haploid ovum. You have learnt in the section on spermatogenesis that the differentiation of sperm occurs after the meiotic events. In oogenesis the process of first meiotic division is very prolonged; and it is during this process that growth and differentiation of oocyte take place. In many animals most events related to oocyte differentiation occur during prophase I of first meiotic division. In animals which produce yolk-laden eggs, this phase is divided into
Which of the following pairs of events in a human female occur at, or nearly at, the similar time during the menstrual cycle? A. High blood plasma LH levels and ovulation. B
What is Coelom - Body Cavity explain? Among the bilaterally symmetrical organisms, animals have three different types of body plans with respect to body cavities. The term coel
Vasa are a maternal-effect gene whose product functions in development of the posterior end of the Drosophila embryo. runt is a non-maternal-effect gene whose product functions in
Q. What is the parasite that causes toxoplasmosis? How is the disease transmitted and what are its typical manifestations? The Toxoplasmosis is caused by the protozoan Toxoplas
Bone Density The compact bone surrounding dense evenly spaced trabeculae with small cancellous spaces is ideal/suitable for implant placement. Dense or porous cortical bone is
What are the genotypes and respective blood types of the ABO system? Since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB), IB
Describe about Abdominojugular and Hepatojugular Reflux ? The term was first coined in 1885 to test the further rise in jugular venous pressure to elicit presence of h;art fail
Haemodynamics : The type of valves chosen should have excellent haemodynamics. In studies at rest and on exercise the valve should produce only acceptable diastolic gradients in
MITOCHONDRIA (Singular- MITOCHONDRION) These are conspicuous, hollow sac liked cell organelles found in all eukaryotic cells except mature red blood corpuscles RBC s
the appendages of arthropods; a. may serve as walking legs, b. may be modified into atennae, c. may be modified into large pincers, or d. all of the above
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