2015 Dna And Passing Genes Quiz (Page 4 of 4) in pdf

2015 Dna And Passing Genes Quiz Page 4

bases have a new matching nucleotide, the split strand is a complete, exact copy of the original

strand.

17. Describe the 2 processes organisms use to create new cells. Why does an organism need 2 different cell

division processes?

Many organisms use both mitosis and meiosis to create new cells. Two different process are needed

because meiosis creates cells with one copy of each chromosome that can be used for reproduction.

18. How many chromosomes will a new human body cell (any cell in the body except a sex cell) contain?

Human body cells contain 46 chromosomes; 23 from mom and 23 from dad.

19. How many chromosomes will a new human sex cell (any cell involved in reproduction) contain?

Human reproductive cells have only 1 copy, so they contain only 23 chromosomes.

20. How is DNA passed on to the offspring in sexual reproduction?

One copy of each chromosome of DNA is contained in the egg and sperm cells. When these 2 cells

combine, the new human has 46 chromosomes, 1 copy of each chromosome from each parent and has

all the information it needs to grow and live.

2015 Dna And Passing Genes Quiz Page 4