Question

Choose which sentence is true about alleles.
1. Recessive alleles are never present when dominant alleles are present.
2. Alleles are different forms of a gene.
3. A trait controlled by a dominant allele never shows up in the organism when the allele is present.
4. Recessive alleles hide dominant alleles

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Answer 1

Answer:

1st answer :- Recessive alleles are never present when dominant alleles are present. Alleles are different forms of a gene. A trait controlled by a dominant allele never shows up in the organism when the allele is present.

2nd ans :- An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.

3rd answer :- Recessive alleles are never present when dominant alleles are present. Alleles are different forms of a gene. A trait controlled by a dominant allele never shows up in the organism when the allele is present.

4th answer :- Recessive

If the alleles are different, the dominant allele will be expressed, while the effect of the other allele, called recessive, is masked. In the case of a recessive genetic disorder, an individual must inherit two copies of the mutated allele in order for the disease to be present.