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Allele definition biology || NEET | AIIMS ||

  Alleles  Each gene may exist in alternative forms known as alleles, which code for different versions of a particular inherited character.  We may also define alleles as genes occupying corresponding positions on homologous chromosomes and controlling the same characteristic (e.g. height of plant) but producing different effects (tall or short).  The term homologous refers to chromosomes that carry the same set of  genes in the same sequence, although they may not necessarily carry    identical alleles of each gene.             Wild-type Alleles Normal or Prevalent alleles in a population are called wild-type alleles. These alleles typically encode proteins that are made in the right amount and function normally.  Mutant Alleles   Alleles that are present at less than 1% in the population and have been altered by mutation are called mutant alleles .  Such alleles usually result in a reduction in the amount or function of the wil
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Class 10 life processes important questions

1. What are enzymes? Name any one enzyme of our digestive system and write its function. Answer. Enzymes are biological catalysts. Catalysts are proteins that increase the rate of chemical reactions without being used up.    For example: Amylase catalyses the breakdown of starch into sugars in the mouth and small intestine      2.  (i) Write the balanced chemical equation for the process of photosynthesis,  Answer.  Photosynthesis can be represented using a chemical equation. The overall balanced equation is                         6CO 2   +   12H 2 O            Sunlight               C 6 H 12 O 6 + 6H 2 0 + 6O 2    (ii) When do the desert plants take up carbon dioxide and perform      photosynthesis?    Answer.    Desert plants open up their stomata during night and take in CO 2 . Stomata remains close during the day time to prevent the loss of water by transpiration. They store the CO 2 in their cells until the sun comes out and they can carry on with photosynthesis duri
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Circadian Clock in Mice controls by Sodium, New Study Reveals.

Circadian Clock in Mice controls by Sodium,   New Study Reveals. A new research published this week in the journal Nature shows that injection of salt mice ( hypertonic saline ) leads to activation of neurons in the suprachiasmatic nucleus, the circadian master clock for the brain. Our circadian clock or circadian rhythm adapts the cells and organs of our body at various times of the day to change requirements. Circadian rhythm disturbance due to jetlag or shift work may cause negative health consequences. Light the primary factor that regulates our circadian clock is clearly defined, it was unclear whether or how physiological factors could regulate the suprachiasmatic nucleus. "With our analysis we are the first to show that the physiological signals in the suprachiasmatic heart can actually control clock times," said Professor Charles Bourque, a researcher at the McGill University Health Center's research center. Professor Bourque and PhD
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Define Life Processes Class 10

What are life processes ??   The maintenance functions of living organism must go on even when they are not doing anything particular. Even when we are just sitting in class, even we are just asleep; this maintenance job has to go on. The processes which together perform this maintenance job our life processes.  Since these maintenance processes are needed to prevent damage and break-down, energy is needed for them. This energy comes from outside the body of the individual organism. So there must be a process to transfer a source of energy from outside the body of the organism, which we called food, to the inside, a process we commonly called nutrition . If the body size of the organism is to grow, additional raw material will also be needed from outside. Since life on earth depends on carbon-based. molecules, most of these food sources are also carbon-based. Depending on the complexity of these carbon sources different organisms can then use different kinds of nutritional pro
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Larval forms of Echinoderms……..

Larval forms of Echinoderms…….. A. Dipleurula Larva: 1. The dipleurula form is reached during development and is characterised by its bilaterally symmetrical, egg-shaped body. 2. The ventral concave side bears the mouth and is encircled by a circumoral ciliated band. 3. The digestive canal is differentiated into oesophagus, stomach and intestine while anus is disposed ventrally. 4. The pre-oral lobe which is situated at the anterior to mouth, bears an apical sensory plate and a tuft of cilia. 5. The ciliation on the surface of the body becomes reduced to a ciliard band. >>> This Dipleurula form is regarded by many as the hypothetical ancestral form of Echinoderm, as this form is universally present. The Dipleurula concept was first propounded by Bather (1900). The major changes involved in other Echinoderm lar­vae are due to differential disposition of the ciliated bands.                         
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Inborn error of Metabolism; Alkaptonuria and Phenylketonuria by video lecture

How metabolism problems comes from parents ?? Watch this video for better understand
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