Living Environment - Mitosis and Meiosis
True or False. The DNA in the daughter cells arising from asexual reproduction are identical to that of the parent cell.
True
True or False. Gametogenesis results in the production of sperm and egg through the process of meiosis.
True. Produces gametes (sperm and egg)
If the chromosome number in a root cell of a plant is 28, how many chromosomes are in the EGG cell nucleus of the plant?
14. The clue is the word EGG (sexual reproduction), so if we start out with 28 chromosomes in the ROOT CELL, you will end up with 1/2 or 14.
The species chromosome number of orangutans is 48. How many chromosomes are there in each sperm and egg that result in 48 from sexual reproduction?
24 in each. 24 in sperm plus 24 in egg = 48 . The number in each sperm and egg is always equal in normal fertilization.
With asexual reproduction, if a parent (could be plant, animal, single-celled organism) has 46 chromosomes, how many will each daughter cell have?
46. Each new daughter cell produced by mitosis will have the same number chromosomes as the parent or mother cell.
What is the term for body cells that divide uncontrollably and invade surrounding tissues and interfere with normal functioning of the body?
Cancer
True or False. Asexual reproduction involves the fusion of gametes and the number of chromosomes always changes.
False. It does not involve the fusion of gametes (sex cells-sexual repro.) and the number of chromosomes produced in the daughter cells remains the same.
True or False. One primary sex cell undergoes the process of oogenesis (production of eggs) and results in the production of one diploid (2n) ovum.
False. Oogenesis results in the production of one egg and polar bodies. Remember, the polar bodies die off. In humans, the egg will have 23 chromosomes or "n" number.
What creates the greatest degree of genetic variation in offspring?
Fertilization (think humans). In asexual reproduction, there is no genetic variety in the offspring (two daughter cells).
What organs does meiotic cell division take place to produce sperm and egg?
Gonads - the testes in male and ovary in female
Sexual reproduction is achieved through mitosis or meiosis?
Meiosis
Asexual reproduction involves the process of mitosis or meiosis?
Mitosis - Produces "2n" number of chromosomes
True or False. Sexual reproduction is a biological process that creates a new organism by combining the genetic material of two organisms in a process that starts with meiosis.
True
True or False. Mitosis is the process that is used for growth, repair, and cell replacement (ex. damaged skin reparing itself through the production of new skin cells).
True.
The hydra undergoes what type of asexual reproduction?
budding
