I need help with my science HW..... Its on heredity?

Question

here are the question........
Why are the offsprings that result from sexual reproduction diffirent from their parents

Answer 1

Some animals reproduce asexually (without sex between a male and female) and are clones of their mother with the same DNA and look the same as them. They only look different if a mutation causes an evolutionary step.

Humans reproduce sexually. Your DNA is a mixture of bits of DNA (chromosomes) from your mother and your father.

What you look like is determined by your DNA.

Since you're a mixture of your mother and father's DNA, you don't look exactly like one or the other.

Brothers don't look the same as each other, unless a fertilised egg splits in 2 and you are identical twins with the same DNA, because for each chromosome, a mother or father has several different chromosomes and you may get any one of them. Hence, each brother is a different mix of their mother and father's DNA and looks different. The same applies for sisters.

Read the articles for minor errors and over-simplification in this.