Introductory Genetics Chien-Ming Li MD, PhD. The male reproductive system Sex chromosome: XY, the 23rd pair SNY gene Penis Scrotum – Epididymis – Testis:

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Presentation transcript:

Introductory Genetics Chien-Ming Li MD, PhD

The male reproductive system Sex chromosome: XY, the 23rd pair SNY gene Penis Scrotum – Epididymis – Testis: sperm, without mitochondria Meiosis: N

The female reproductive system Sex chromosome: XX, the 23 rd pair Uterus Fallopian tube Ovary Vagina Cervix Labia Egg: meiosis, N, with mitochondria

Gregor Mendel: pea R gene: dominant Red flower: RR or Rr White flower: rr RR x rr  Rr Rr x Rr  RR: Rr: rr, 1:2:1

Central dogma DNA (in nucleus)  RNA  protein  function DNA – Adenine (A) – Thymine (T) – Guanine (G) – Cytosine (C) DNA: double helix, A-T, G-C

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