6 .A) If one follows 120 primary oocytes in an animal through their various stag

Question

6.A) If one follows 120 primary oocytes in an animal through their various stages of oogenesis, how many secondary oocytes would be formed?

B) How many first polar bodies would be formed?

C) How many ootids would be formed?

D) If one follows 120 primary spermatocytes in an animal through their various stages of spermatogenesis, how many secondary spermatocytes would be formed?

E) How many spermatids would be formed?

14. From which phase of the cell cycle does a cell enter G0 phase

21. Which of the following is true about the second meiotic division?

-The products are four identical gametes.

-Homologous chromosomes are pulling apart.

-Nondisjunction would lead to extra bivalents forming.

-Synapsis occurring in the second meiotic division.

-Sister chromatids are pulling apart.

23.Which if the following is true?

-Cells are 4n after S phase. -Sister chromatids in mitosis are not identical. -Cells are considered to be 2n after meiosis I. -A chromosome always contains the same number of chromatids, regardless of phase of the mitotic or meiotic cell cycle. -A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle.

Explanation / Answer

6A Ans: 120 secondary oocytes would be formed.

6B Ans: 120 first polar bodies would be formed.

6C Ans: 120 Ootids would be formed.

6D Ans: 240 secondary spermatocytes would be formed.

6D Ans:480 spermatids would be formed.

14 Ans: M phase of the cell cycle does a cell enter G0 phase

21 Ans: The products are four identical gamates TRUE

Homologous chromosomes are pulling apart.  TRUE

Nondisjunction would lead to extra bivalents forming FALSE

Note:Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division. There are three forms of nondisjunction: failure of a pair of homologous chromosomes to separate in meiosis I, failure of sister chromatids to separate during meiosis II, and failure of sister chromatids to separate during mitosis.[Nondisjunction results in daughter cells with abnormal chromosome numbers.

-Synapsis occurring in the second meiotic division. FALSE

sister chromatids are pulling apart. TRUE

23 Ans:

Cells are 4n after S phase. True

Sister chromatids in mitosis are not identical TRUE

Cells are considered to be 2n after meiosis I FALSE

A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle True

Cells are 4n after S phase. True

Sister chromatids in mitosis are not identical TRUE

Cells are considered to be 2n after meiosis I FALSE

A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle True

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.