These various variations of a gene are referred to as alleles. For instance, two alleles may occur at one specific locus, one of which codes for the cytosine base and the other for the thymine base. One copy of the human genome is inherited from each parent. We are hence referred to as diploid organisms.
<h3>What is Allele Frequency ?</h3>
The relative frequency of an allele at a certain locus in a population, represented as a fraction or percentage, is known as gene frequency or allele frequency. The percentage of chromosomes in the population that carry that allele relative to the whole population or sample size is what is being discussed.
The frequency of an allele in a population is referred to as its allele frequency. It is calculated by dividing the number of gene copies by the number of times the allele occurs in the population. All the copies of every gene in a population make up the gene pool of that population.
<h3>What is Allele ?</h3>
Leading textbooks on genetics and evolution define an allele as a different variation of the same sequence of nucleotides at the same location on a long DNA molecule. "The chromosomal or genomic location of a gene or any other genetic element is called a locus and alternative DNA sequences at a locus are called alleles.
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Deletions are mutations<span> in which a section of DNA is lost, or deleted. Since protein-coding DNA is divided into codons </span>three<span> bases long, insertions and deletions can alter a gene so that its message is no longer correctly parsed. These changes are called frameshifts.</span>
Oil and natural gas were formed from the remains of prehistoric plants and animals—that's why they're called fossil fuels. Hundreds of millions of years ago, prehistoric plant and animal remains settled into the seas along with sand, silt and rocks.
The answer is B. and D. they contain plants that purify the water and they take habitats away from animals.
The answer is free energy..........
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