Is masked or covered up when the dominant allele is present?

A B
alleles alternate forms of a gene
recessive allele the allele that is masked or covered up when the dominant allele is present
dominant allele the allele whose trait always shows up if the allele is present
probability the likelihood that a particular event will occur

What is an allele that is masked when a dominant allele is present?

Chap. 3 Genetics: The Science of Heredity

A B
recessive allele an allele that is masked when a dominant allele is present
hybrid an organism that has different alleles for a trait: an organism that is heterozygous for a particular trait
probability the likelihood that a particular event will occur

When a dominant allele is present?

When two copies of a gene are present a dominant allele will result in the associated phenotype being expressed even when the dominant allele is only present on one copy of the chromosome.

Can a dominant allele be hidden?

One allele for every gene in an organism is inherited from each of that organism’s parents. … The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype.

When two alleles are the same they are?

Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism.

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How can a dominant allele be rare?

Rare Dominant Genes



Some dominant genes are rare, meaning that a small subset of humans have the dominant allele. The polydactyly trait — having extra fingers or toes — is one example of a rare inherited dominant gene trait.

When a dominant allele is present the offspring will show what characteristics?

When a dominant allele is present it will show itself. A recessive allele will only show itself when there are two.

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