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Question
What is an allele?(1 point)
Responses
a trait that can be masked
a trait that can be masked
a variant form of a gene
a variant form of a gene
a non-inherited trait
a non-inherited trait
a trait that appears in an offspring if one of the parents contributes it
a trait that appears in an offspring if one of the parents contributes it
A student claims that dominant traits are always the most common traits. Is this true? Why or why not?(1 point)
Responses
Yes, dominant traits became more common over time as they are passed down from generation to generation; recessive alleles continue to become less common over time.
Yes, dominant traits became more common over time as they are passed down from generation to generation; recessive alleles continue to become less common over time.
Yes, dominant traits are called dominant because they are the most common.
Yes, dominant traits are called dominant because they are the most common.
No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.
No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.
No, dominant traits only show up if they are inherited; how common they are is not influenced by this.
No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.
Which statement below correctly describes a component of sexual reproduction?(1 point)
Responses
Each parent has two alleles and they pass both down to their offspring.
Each parent has two alleles and they pass both down to their offspring.
Only dominant alleles are passed to offspring.
Only dominant alleles are passed to offspring.
One parent passes down the majority of genes an offspring will receive.
One parent passes down the majority of genes an offspring will receive.
Each parent has two alleles per trait and passes one allele to their offspring.
Each parent has two alleles per trait and passes one allele to their offspring.
An allele is a variant form of a gene.
The correct answer is: a variant form of a gene.
To understand what an allele is, we need to start with understanding genes. Genes are segments of DNA that code for specific traits or characteristics in an organism. Each gene can have multiple forms, which are called alleles.
Alleles are alternate versions of a gene that are found at the same location, or locus, on a chromosome. They can differ from each other by just a single nucleotide or by larger structural changes in the DNA sequence. These different alleles can result in different variations of a trait.
For example, consider the gene responsible for determining eye color. There can be multiple alleles for this gene, such as one allele for blue eyes and another allele for brown eyes. These different alleles contribute to the variation we see in eye colors among individuals.
So, in summary, an allele is a variant form of a gene that determines specific traits or characteristics in an organism.