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Essential Genes & Lethal Genes MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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Alleles that produce a non functional and harmful lethal allele by mutation in a individual is
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Essential Genes & Lethal Genes
- Essential genes are those that may result in lethal phenotype when mutated.
- Many genes in an organism’s genome are needed for survival. If an allele makes one of these genes nonfunctional, or causes it to take on an abnormal, harmful activity, it may be impossible to get a living organism with a homozygous (or, in some cases, even a heterozygous) genotype.
- Such genes are called lethal genes.
- Some alleles associated with human genetic disorders are recessive lethal.
- Some human disorders are also caused by dominant lethal alleles.
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