In genetics, a carrier is _____.Group of answer choicesalways heterozygous and show no disease symptoms.always heterozygous and show disease symptoms.always homozygous and show disease symptoms.always homozygous and show no disease symptoms.Next

In genetics, a carrier is always heterozygous and shows no disease symptoms.

Here's why:

1. In genetics, individuals have two copies of each gene - one from the mother and one from the father. These copies can be the same (homozygous) or different (heterozygous).

2. A carrier is an individual who has one copy of a gene mutation that causes a particular disease, but does not have the disease themselves. This is because the disease is recessive, meaning it only shows up if an individual has two copies of the mutation.

3. Therefore, carriers are always heterozygous - they have one normal copy of the gene and one mutated copy.

4. Because they have one normal copy of the gene, carriers do not show disease symptoms. The normal gene copy does what it's supposed to do, so the individual remains healthy. However, they can pass the mutated gene copy onto their children.