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Complete haploid set of chromosomes of a species is
A. Genome
B. Genotype
C. Genetic code
D. Allele

Answer
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Hint: A chromosome is a long DNA molecule that contains some or more of an organism's genetic material. Most eukaryotic chromosomes contain packing proteins called histones, which attach to and condense the DNA molecule to protect its integrity with the help of chaperone proteins. Chromosomes are classified into four types: metacentric, submetacentric, acrocentric, and telocentric.

Complete answer:
Option A: The haploid sequence of chromosomes found in each cell of a multicellular organism or a gamete or microorganism. The genome is an organism's entire collection of DNA. Almost every cell in the body has a complete copy of the approximately 3 billion DNA base pairs, or letters, that comprise the human genome. As a result, option A is right.

Option B: A genotype is a person's set of genes. The expression may also apply to the two alleles inherited for a certain gene. As the information encoded in the genes' DNA is used to produce protein and RNA molecules, the genotype is expressed. As a result, option B is incorrect.

OptionC: Genetic coding refers to how the four bases of DNA—A, C, G, and Ts—are strung together so that the cellular machinery, the ribosome, can decipher them and convert them into a protein. Every three nucleotides in a row count as a triplet in the genetic code and code for a single amino acid. As a result, it is wrong.

Option D: An allele is one of two or more variants of a given gene. The ABO blood classification, for example, is dominated by the ABO gene, which has six common alleles. About every living human's ABO gene-phenotype is a combination of these six alleles. As a result, this is indeed false.

A gamete or microorganism's haploid series of chromosomes, or each cell of a multicellular organism." According to the Oxford Dictionary, a genome is any haploid chromosome group. A gamete is a sex cell with a haploid series of chromosomes, whereas bacteria only have a single chromosome.

Hence, the correct answer is option A.

Note: Our bodies are made up of millions (100,000,000,000,000) of cells, each with its own full set of instructions for creating us, similar to a recipe book for the body. Our genome is made up of DNA and contains this series of instructions. This same sequence of instructions can be used in any cell in the body, such as a skin cell or a liver cell.