题目内容
（请给出正确答案）
[单选题]
How much DNA does a primary spermatocyte contain？
A.IN
B.2N
C.4N
D.6N
提问人：网友mlsnws
发布时间：2022-01-07
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A、$ 100
B、$ 200
C、$ 120
D、$ 140
题目内容
（请给出正确答案）
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更多“How much DNA does a primary sp…”相关的问题
第2题
During ovulation,the secondary oocyte resides at what specific stage of meiosis?
A、Prophase of meiosis I
B、Prophase of meiosis II
C、Metaphase of meiosis I
D、Metaphase of meiosis II
第3题
Concerning maturation of the female gamete(oogenesis),when do the oogonia enter meiosis I and undergo DNA replication to form primary oocytes?
A、During fetal life
B、At birth
C、At pubery
D、With each ovarian cycle
第4题
Where do primordial germ cells initially develop?
A、In the gonads at week 4 of embryonic development
B、In the yolk sac at week 4 of embryonic development
C、In the gonads at month 5 of embryonic development
D、In the gonads at puberty
第5题
A 20-year-old woman presents at the emergency department with severe abdominal pain on the right side with signs of internal bleeding. She indicated that she has been sexually active without contraception and missed her last menstrual period. Based on this information, which of the following disorders must be included as an option in the diagnosis?
A、Ovarian cancer
B、Appendicitis
C、Normal pregnancy
D、Ectopic tubal pregnancy
第6题
When does a secondary oocyte complete its second meiotic division to become a mature ovum?
A、At ovulation
B、Before ovulation
C、At fertilization
D、At puberty
第7题
How soon after fertilization occurs within the uterine tube does the blastocyst begin implantation?
A、By 12 hours
B、By day 1
C、By day 2
D、By day 7
第8题
Where does the blastocyst normally implant?
A、Functional layer of the endometrium
B、Basal layer of the endometrium
C、Myometrium
D、Perimetrium
第9题
Which of the following events is involved in the cleavage of the zygote during week 1 of development?
A、Production of highly differentiated blastomeres
B、An increased cytoplasmic content of blastomeres
C、An increase in size of blastomeres
D、A decrease in size of blastomeres
第10题
Which of the following structures must degenerate for blastocyst implantation to occur?
A、Endometrium in progestational phase
B、Zona pellucida
C、Syncytiotrophoblast
D、Cytotrophoblast
