How much DNA does a primary spermatocyte contain?
A.IN
B.2N
C.4N
D.6N
- · 有4位网友选择 B,占比50%
- · 有2位网友选择 C,占比25%
- · 有2位网友选择 A,占比25%
A.IN
B.2N
C.4N
D.6N
A、$ 100
B、$ 200
C、$ 120
D、$ 140
A、Prophase of meiosis I
B、Prophase of meiosis II
C、Metaphase of meiosis I
D、Metaphase of meiosis II
A、During fetal life
B、At birth
C、At pubery
D、With each ovarian cycle
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
A、Ovarian cancer
B、Appendicitis
C、Normal pregnancy
D、Ectopic tubal pregnancy
A、At ovulation
B、Before ovulation
C、At fertilization
D、At puberty
A、By 12 hours
B、By day 1
C、By day 2
D、By day 7
A、Functional layer of the endometrium
B、Basal layer of the endometrium
C、Myometrium
D、Perimetrium
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
A、Endometrium in progestational phase
B、Zona pellucida
C、Syncytiotrophoblast
D、Cytotrophoblast
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