Question

question 19 1 pts all of the following occur as a result of meiosis except: chromosome number remains at 46. primitive sex cells become mature gametes. the cells become haploid. meiosis occurs in two steps. question 20 1 pts a dna molecule is characterized by all of the following except: double helix shape. obligatory base pairing. ribose sugar. phosphate groups. quiz saved at 2:21pm submit quiz

Explanation:

• Question 19: Meiosis is a type of cell - division that reduces the chromosome number by half, from diploid (46 chromosomes in humans) to haploid (23 chromosomes in humans). Primitive sex cells do become mature gametes, the cells become haploid, and meiosis occurs in two steps (meiosis I and meiosis II). The chromosome number does not remain at 46.
• Question 20: DNA has a double - helix shape, has obligatory base - pairing (A - T, G - C), and contains phosphate groups. However, the sugar in DNA is deoxyribose, not ribose. Ribose is the sugar in RNA.

Answer:

Question 19: chromosome number remains at 46.
Question 20: ribose sugar.