Why is it necessary for pollen grains and ovules (eggs) to contain only half the proper amount of DNA?
2007-01-11 18:24:56 · 6 answers · asked by Sarah S 3 in Science & Mathematics ➔ Biology
Because they combine with another cell that also contains half the proper amount of DNA (eg sperm). Together they each contribute half to make up the correct amount of DNA for the new organism that they are creating.
By blending the DNA of two different individuals, nature gets to experiment a lot more without having to wait for mutations and so on.
2007-01-11 18:31:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋
because pollen grains are gametes (haploid cells) which will combine with another gamete through fertilization and produce an individual with a full amount of DNA.
HOPE THIS HELPS!!!!â¥
2007-01-12 02:31:48 · answer #2 · answered by ♥βετ§¥♥ 2 · 0⤊ 0⤋
They are reproductive cells..which are halploid meaning that they contain only half the no of chromosomes as other cells of that organism which are diploid containing fulls sets of chromosomes...
reproductive cells(gametes) conatin only half the no. of chromosomes so that when they combine ..a proper diploid no of chromosomes is obtained.
2007-01-12 03:52:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
basically, genetic variance. it ensures that the flaws of one organism's dna aren't continued into all its offspring thereby letting the species adapt to new conditions. what is not beneficial in one organism can be cancelled out by the dna of the other organism
2007-01-12 02:30:56 · answer #4 · answered by judy_r8 6 · 1⤊ 0⤋
Hi Sarah, So they can make a baby seed.
Clowmy
2007-01-12 02:31:44 · answer #5 · answered by Anonymous · 0⤊ 0⤋
because when the two get together the halves match up and begin to multiply causing a seed.
2007-01-12 02:28:37 · answer #6 · answered by Anonymous · 0⤊ 0⤋