GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Half from their mom, half from their dad
|
|
|
From their mom
|
|
|
From their dad
|
|
|
From their brains
|
Detailed explanation-1: -To form a fetus, an egg from the mother and sperm from the father come together. The egg and sperm each have one half of a set of chromosomes. The egg and sperm together give the baby the full set of chromosomes. So, half the baby’s DNA comes from the mother and half comes from the father.
Detailed explanation-2: -You receive 50% of your genes from each of your parents, but the percentages of DNA you received from ancestors at the grandparent level and further back are not necessarily neatly divided in two with each generation.
Detailed explanation-3: -We share 1/2 of our genetic material with our mother and 1/2 with our father. We also share 1/2 of our DNA, on average, with our brothers and sisters. Identical twins are an exception to this rule. They share all of their DNA.
Detailed explanation-4: -One copy is inherited from their mother (via the egg) and the other from their father (via the sperm). A sperm and an egg each contain one set of 23 chromosomes. When the sperm fertilises the egg, two copies of each chromosome are present (and therefore two copies of each gene), and so an embryo forms.
Detailed explanation-5: -Because each pair of chromosomes contains one from each parent, an individual will inherit a unique mix of genes from their mother and father.