ANIMAL REPRODUCTION AND DEVELOPMENT
ASEXUAL REPRODUCTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Only animals have DNA in their cells
|
|
|
DNA research is simple and quick
|
|
|
DNA contains many genes
|
|
|
None of the above are true.
|
Detailed explanation-1: -The complete DNA instruction book, or genome, for a human contains about 3 billion bases and about 20, 000 genes on 23 pairs of chromosomes. What is DNA made of? DNA is made of chemical building blocks called nucleotides.
Detailed explanation-2: -An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.
Detailed explanation-3: -Your genes are an instruction manual for your body. Hidden inside almost every cell in your body is a chemical called DNA. A gene is a short section of DNA. Your genes contain instructions that tell your cells to make molecules called proteins.