Dr. Hovey UC Davis ANS 001 Midterm 2 (practice exam)

Horses have ___ chromosomes

64

Mule and Hinnys have ___ chromosomes, which means they cannot ___

63; reproduce

Tooth often removed due to irritation with the bit

Wolf Tooth

As horses age, a black streak often appears on their incisors called ___, and the horse's ___ are worn down on the top of each tooth.

Galavayne's Groove; Cups

A horse's digestive system is:

monogastric, hind gut fermentors

Energy required to stay alive. breathing, standing, eating etc.

Maintenance energy

delayering of the hoof wall from the rest of the hoof. often caused by colic, bad diet, or low blood pH

Laminitis

Horse placenta type

diffuse

Controls production of pigment by melanocytes. Determines how much melanin is produced, more melanin means a black coat, less means a red coat.

E Locus

A fish that is able to tolerate a wide range of salinity is called ___

Euryhaline

A fish that moves from saltwater to freshwater in the course of its life is called___

Diadromous

A fish that lays eggs in freshwater, returns to saltwater for most of its life but then goes back to freshwater for breeding is called ___.

Anadromous

A mouse has ___ chromosomes and is in the genus ____.

40; Mus

True or False: Placing a new male into a cage with all pregnant females will make them abandon their pups after giving birth.

False!

Rats and mice are ___, but kept on a veggie based diet in captivity.

omnivores

Mice are able to house more mice together, fast reproduction, short generation intervals, can be genetically manipulated easily.

Why mice are preferred over rats

Mouse that lacks a thymus, resulting in no immune system due to a lowered amount of T cells.

nude mouse

Lab mice should be ___ in order to stop any genetic variation. phenotype= genotype+ environment.

inbred

According to the ____ effect, if male bedding is placed into a cage with all females, the females will go into induced synchronized estrus.

Whitten

A mouse has a ____ day long estrous cycle

4-5

___ are better at toxicity testing and surgeries.

Rats

True or False: The rabbit eye and lung mimics a human's but are not tested on as often due to anthropomorphism of the animal.

True!

Taking out a part of the genetic code

knockout

inserting a piece of genetic code from a different species. This makes a certain protein overexpressed.

transgenic

The consumption of feces by rodents

coprophagia

Slowing down metabolism to hibernate in hamsters is called ___.

Torper

reducing an animals pain during surgery and testing is called ___.

analgesia

In genetics, a + refers to ___.

wild type gene

Male stimulation of the female rabbits cervix causes which hormone to be released?

gonadotropin releasing hormone

How many chickens are there across the planet? How many in the US?

19 billion; 9 billion

In the digestive system, chickens can produce ___ and store food in their crops.

crop milk

The proventriculus is part of the ____ system in birds and its main function is to produce ____.

digestive; enzymes

A ___ is a young female chicken before she starts laying eggs.

Pullet

Chickens have an ovulation event every ___ hours, which begins after hitting puberty at ___ months old.

24-25; 4-5

Chicken fertilization occurs in the ___.

infundibulum

How long does the egg stay in the uterus?

18-20 hours

A yolk can get stuck in the infundibulum, only to be pushed down by another yolk the following day. What does this result in?

double yolked egg

What is formed in the magnum?

Egg whites

How long can sperm survive in the infundibulum?

10 days

A hen is ___ when she is trying to lay and incubate her unfertilized eggs. This can result in her going into diestrus.

broody

Young male chicken less than a year old

cockerel

Practice where a single entity controls the entire process of a product, from the raw materials to distribution. In animal science, this might be owning the animals at every stage, owning feed companies, owning slaughterhouses, and also selling their own products to consumers.

Vertical integration

Dog dental formula

3/3 1/1 4/4 2/3

Dogs have __ cycles a year, while wolves only have __.

2;1

The dog has a ___ placenta

zonary

The egg stays in the magnum for how long?

3 hours

How long is the magnum?

30 cm

how long does the egg stay in the Isthmus?

1 1/2 hours

how long is the egg in the infundibulum?

15 min

Where are the shell membranes added?

isthmus

What type of digestion occurs in the gizzard?

physical

how many eggs are produced in the US per year?

100 billion

chickens have __ chromosomes

78

the ___ is used for all reproductive, digestive, urinary, and laying eggs for birds

cloaca

Aquaculture is defined as the breeding, rearing, and harvesting of ___ in all types of water environments

aquatic plants, animals and shellfish

which type of seafood represents 50% of the worlds seafood production?

finfish

Fish that cannot tolerate a wide fluctuation in the salinity of water are called ____.

stenohaline

The flexible air-filled sac located above the viscera is called the ___.

swim bladder

The ___ allows water to pass through the gills.

mantle

Rabbits conduct___ which is eating the soft feces shortly after expulsion.

coprophagy

The offspring of a rabbit is referred to as a ___.

Kit