HEREDITY
LAW OF DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one organism is heterozygous and the other organism is hybrid
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one organism is heterozygous and the other is homozygous recessive
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one organism is homozygous dominant and the other is homozygous recessive
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one organism is homozygous dominant and the other is heterozygous
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Detailed explanation-1: -Recessive alleles only demonstrate their effect if the individual has two copies of the alleles. Hence, due to the presence of dominant alleles in the genotype of organisms, phenotypes appear the same even though they differ in the genotypes.
Detailed explanation-2: -In addition, different genotypes can lead to the same phenotype. This happens because genes have different alleles. For some genes and traits, certain alleles are dominant while others are recessive.
Detailed explanation-3: -For example, you can be heterozygous for the gene that controls hair color, but homozygous for the gene that controls eye color. This just means that you have two different versions of the hair color gene, and two identical copies of the eye color gene. Each version or variation of a gene is called an allele.
Detailed explanation-4: -Recessive alleles only express their phenotype if an organism carries two identical copies of the recessive allele, meaning it is homozygous for the recessive allele. This means that the genotype of an organism with a dominant phenotype may be either homozygous or heterozygous for the dominant allele.