What are lethal alleles?

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Multiple Choice

What are lethal alleles?

Lethal alleles are specific types of mutated genes that can lead to the death of an organism when they are expressed in a certain genotype. This typically occurs when an individual inherits two copies of a lethal allele, resulting in a genotype that affects critical biological functions, ultimately leading to mortality. For example, in some genetic diseases, if an organism has two copies of a recessive lethal allele, the combination prevents the organism from developing normally, resulting in early death before it can reproduce. This highlights the importance of understanding how certain alleles can have a profound impact on survival and reproductive success. In contrast, the other options describe different genetic scenarios that do not align with the definition of lethal alleles.

Lethal alleles are specific types of mutated genes that can lead to the death of an organism when they are expressed in a certain genotype. This typically occurs when an individual inherits two copies of a lethal allele, resulting in a genotype that affects critical biological functions, ultimately leading to mortality.

For example, in some genetic diseases, if an organism has two copies of a recessive lethal allele, the combination prevents the organism from developing normally, resulting in early death before it can reproduce. This highlights the importance of understanding how certain alleles can have a profound impact on survival and reproductive success. In contrast, the other options describe different genetic scenarios that do not align with the definition of lethal alleles.

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