Genetics 3 - sex anomalies Flashcards
(24 cards)
refers to an animal of equivocal sex,
hermaphrodite,intersex
In farm animals, hermaphroditism is most common in
cattle, pig , goats
has the gonads of both sexes,
true hermaphrodites
when both male and female gonadal tissues are present and functional in that animaL
true herma
true hermaphro is commonly seen in
pigs
refers to an individual with testes as the gonads with the sex chromosomes either XY, or XX with a translocated portion of the Y.
male pseudoherma
In cattle, female pseudohermaphroditism is known as “___” and exhibits nymphomaniac
buller
This condition is caused by an X..linked recessive gene, resulting in the failure of the target organs to respond to testosterone
testicular feminization
intersexuality known to exist since the first century BC.
freemartinism
The earlier the anastomosis occurs, the lesser the degree of masculinization of the female cotwin.
greater
freemartins vaginal probing with a speculum reveals a short (about one..third the normal length), blind..ended vagina known as
cul-de-sac vagina
A definitive diagnosis by karyotyping the suspected individual of freemartinsim reveals__
chimerism
The ___ theory for the induction of freemartinism is based on the exchange of blood forming cells and germ cells between the fetuses
cellular
hormones from the male twin that reach the female through vascular anastomoses between the fused placentas cause masculinization of the female gonad.
hormonal theory
the alive calf which twin had degenerated in freemartinism is a __
chimera
Mitotic divisions while male is in utero, or during postpu.. berty first or second meiotic division after puberty
paternal gametogenesis
Improper division of one or more chromosomes, ana.. phase lag, or nondisjunc.. tion; failure of cleavage of blastomeres or mosaic embryo
zygote
Normal chromosomes with errors during fertilization; fertilization of a normal egg by two normal sperm
fertilization
Somatic division of oogonia be.. fore onset of meiosis or during first or second meiotic division
maternal gametogenesis
One distinctive feature shared by hybrids of the bovids is that the female hybrids exhibit normal fertility and the male hybrids show sterility.
t
the Y chromosome is a small __ in B. indicus and a small __ in B. taurus.
acrocentric
submetacentric
the hybrid “line” based on Brahman bulls has an acrocentric Y chromosome, while that based on European bulls has a submetacentric Y chromosome.
t
diploid # of swamp type buffaloes
48
diploid number of river type buffaloes
50
