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Mutations and genetic recombination (in sexually reproducing organisms) are major sources of variations in natural populations, In this section we will briefly mention the various types of mutations, their rates and how they are caused.
The term mutation is used to designate the process by which changes arise in the genetic material and, the end products of such processes. Mritations form a separate category of sources of variability, distinct' from variability arising from genetic recombination or independent assortment of chromosomes, characteristic of sexually reproducing individuals. There are two categories of mutations. '(1) Chromosomal mutations which affect the'number of chromosomes and the number or the arrangement of gencs in a chromosome; (2) gene mutations which affect only one or a few nucleotides in a gcne. We shall now tiiscuss these two aspects of mutaion.
Agroup of realated genera are classified as-?
Q. What are the events that mark the end and the beginning of the first interphase period? What happens inside the cell in this period? The initial interphase period is the G1.
Copper deficiency Copper deficiency may be primary or secondary (conditional). Primary copper deficiency occurs due to its inadequate dietary intake; whereas secondary copper d
A woman who is heterozygous for a particular X-linked recessive trait marries a phenotypically normal man. What percentage of their sons will show the recessive phenotype?
Define about the Cellulose acetate electrophoresis (CAE)? If the hydroxyl groups in cellulose are reacted with acetic anhydride, cellulose is acetylated to form the raw materia
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What are some human diseases caused by bacteria and what are their respective modes of transmission? The major human bacterial infections transmitted by respiratory secretions
Q. Where are the chemoreceptors that detect the acidity of the trigger and blood the respiratory compensation located? The chemoreceptors that participate in the ventilation co
Open or Blunderbuss Apex or divergent roots The mechanical cleaning & shaping of teeth with blunderbuss canal apex are very difficult if not impossibly orthogratly due to 1
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