Genetics of Reproductive Failure

Question 1

The paired chromosomes in mammalian somatic cells are called

Answer 1

autosomes

Question 2

n exception to these autosomes is the __ chromosomes, which are paired in mammalian females and unpaired in mammalian males

Answer 2

sex

Question 3

what chromosome is larger? X or Y?

Answer 3

X

Question 4

homogametic sex in birds

Answer 4

males ZZ
females ZW

Question 5

what sex determines the sex?

Answer 5

males

Question 6

normal chromosome number for a somatic cell is called the __ number

the gamete has one-half the diploid number and is known as the

Answer 6

diploid

haploid`

Question 7

Chromosomes, arranged systematically according to cytogenetic conventions, is called a__

Answer 7

karyotype

Question 8

The __ is a heterochromatic region (nonstaining) which tends to constrict the chromosome at a specific position (primary constriction).

Answer 8

centromere

Question 9

f the centromere is located at the very end, the chromosome is referred as

Answer 9

acrocentric

Question 10

Genes, located in a fixed position (__) on a chromosome, are the basic units of __.

Answer 10

locus
inheritance

Question 11

the phenotype of an animal is its complete set of genes, and the genotype is the expression of these genes

Answer 11

baliktad

Question 12

trait may only be expressed when both parents have contributed the __ genes.

Answer 12

mutant

Question 13

Autosomal dominant traits affect only males

Answer 13

both sexes

Question 14

has been found in spontaneously aborted fetuses of domestic animals

Answer 14

triploidy

Question 15

__ is believed to be the most common cause of triploidy

Answer 15

polyspermy

Question 16

is considered as a cause of embryonic mor .. tality in domestic animals.

Answer 16

polyploidy

Question 17

refers to the absence of both chromosomes of a homologous pair (2n-2)

Answer 17

Nullisomy

Question 18

occurs when one chromosome of a pair is absent.

Answer 18

monosomy 2n-1

Question 19

Alteration in chromosome number

Answer 19

numerical

Question 20

In:exactlll~l~iplesof haploid number eggs

Answer 20

aneupoloidy

Question 21

syndrome under aneuploidy

Answer 21

klinefelter-like
turner-like

Question 22

An animal with two or more cell popula.. tions (different karyotypes) derived from a single zygote which differ in chromo.. some number and/or structure

Answer 22

mosaic

Question 23

Exact multiples of the haploid number, e.g., 3tl,4n, 5n

Answer 23

Euploidy (Polyploidy)

Question 24

An animal or its tissues having two or more populations of cells derived from two or more zygote

Answer 24

chimera

Question 25

aneuploidy syndrome in cats, mares?

Answer 25

kline
turner

Question 26

mosaic type of alteration is commonly seen in what animal

Answer 26

bull

Question 27

chimera type of alteration is commonly seen in what type of animal?

Answer 27

Freemartin heifer

Question 28

Alteration in structure of the chromosome

Answer 28

strucutural

Question 29

A segment of a chromosome is lost

A chromosome segment exists in excess of the normal

A segment is in a reverse sequence

A segment or a whole arm of one chromosome is transposed to another chromosome

Answer 29

Deficiency
Duplication
Inversion
Translocation

Question 30

boars experience what type of structural alteration?

Answer 30

deficiency, translocation

Question 31

what are bulls’ structural alteration?

Answer 31

inversion

Question 32

Mechanisms resulting in triploidy by

Answer 32

polyandry
polygyny

Question 33

Errors of these kind are associated with unequal segregation (__) or failure of a chromo.. some to move to the nearest pole (____) at mitotic or meiotic anaphase

Answer 33

nondisjunction
anaphase lag

Question 34

misdivision of the centromere may occur occasionally, leading to the formation of an __

Answer 34

isochromosome