OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They have more of the same environmental influences as their brothers/sisters.
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Share more DNA with their siblings from their parents than with their friends.
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They dress the same because their parents are the same.
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They spend more time with their brothers/sisters.
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Detailed explanation-1: -You might look a bit like your brother or sister. This is because families share some variations (also called mutations) in their genes. We could say that genes are small pieces of biological information, passed from parents to their children, encoded in the DNA.
Detailed explanation-2: -Relatedness with Siblings Like you, your siblings inherited 23 chromosomes from each of your parents. But because of DNA swapping, their chromosomes have a different combination of genes than yours. Yet on average, half of the genes are still the same.
Detailed explanation-3: -However, there’s an important distinction–while everyone shares exactly 50% of their DNA with each parent, we share on average 50% of our DNA with our siblings. You can actually be slightly more or less than 50% related to a sibling, for reasons that are explained below.
Detailed explanation-4: -Every human being has a set of chromosomes. These chromosomes are what dictate a person’s genetic makeup, and thus, their physical appearance. Children can look so different from one another because they inherit a random mix of their parents’ genes.