Lect 17 Gametogenesis

Question 1

Quiescent (____) cells are in ____ and can be _____

Answer 1

(stable cells) = G0 phase and can be induced to divide

Question 2

Senescent (____) cells will _____

Answer 2

(permanent) = never divide again

Question 3

Crossing over (chiasmata) happens during ______

Answer 3

Prophase 1

Question 4

Trisomy 13 (______ _____)

Clinical presentation:

Answer 4

Patau’s Syndrome

Cleft lip and palate, polydactyly, microcephaly

Question 5

Trisomy 21 (____ ___)

Clinical Presentation:

Answer 5

Down’s Syndrome

Flat facial profile, simian crease, hypotonia

Question 6

Trisomy 18 (_____ _____)

Clinical presentation:

Answer 6

Edward’s Syndrome

Overlapping fingers, rocker bottom feet, low set ears

Question 7

Prader Willi Syndrome (XY-15 with _____ chromosome deleted)

Clinical presentation:

Answer 7

XY-15 with paternal chromosome deleted

Insatiable hunger (extremely obese kids), narrow temples, elongated face

Question 8

____ cells never enter G0 phase and constantly divide to replace cell populations. These are ______, ____, and ____ ___ cells

Answer 8

Labile cells

gut epithelium, skin, and bone marrow cells