Q17 - Reproduction in Monotremes

Question 1

What are similarities between monotremes and reptiles?

6

Answer 1

Single anogenital opening, internal penis in cloacal pouch, bifurcated penis (like hemi-penis), internal testes (like some eutherians), similar eggs with yolk

Question 2

What are the similarities between monotremes and reptiles?

2

Answer 2

Maternal nutrient transfer (egg forms late on), milk secretion (on fur rather than mammary gland)

Question 3

what are the similarities between monotreme and chicken eggs?
(2)

Answer 3

Meroblastic (yolk containing) eggs, larger than other non-meroblastic eggs

Question 4

what are the differences between monotreme and chicken eggs?

3

Answer 4

Monotreme eggs are 10 time smaller, spend more time internally (28 compared to 1 day) and less time being incubated (10 compared to 21 days)