ALAT Breeding and Reproduction 2

Question 1

What is the typical estrous cycle length for a mouse?

Accepted Answer

4-5 days

Answer

24 hours

Answer

14-16 days

Answer

28 days

Question 2

What is a vaginal plug and what does it indicate in mice?

Accepted Answer

A coagulated mass of seminal fluid indicating mating has occurred

Answer

A sign of infection

Answer

A contraceptive device

Answer

A sign of urinary obstruction

Question 3

What is the typical litter size for laboratory mice?

Accepted Answer

6-12 pups

Answer

1-2 pups

Answer

15-20 pups

Answer

25-30 pups

Question 4

What is the Whitten effect in mouse breeding?

Accepted Answer

Male pheromones synchronize estrous cycles in group-housed females

Answer

Females reject males during light cycle

Answer

Males become infertile with multiple females

Answer

Females produce larger litters in enriched environments

Question 5

At what age are mouse pups typically weaned?

Accepted Answer

21 days

Answer

7-10 days

Answer

14 days

Answer

35 days

Question 6

Why avoid disturbing a mouse dam's cage in the first 48 hours after birth?

Accepted Answer

Disturbance can cause the dam to cannibalize pups due to stress

Answer

The cage is sterile

Answer

Pups need darkness

Answer

Cage changing isn't due yet