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Biology
Undergraduate 1
07/12/2010

Additional Biology Flashcards

 


 

Cards

Term
sex
Definition
the nature of biological differences between male and female
Term
sexuality
Definition
all factors that contribute to ones male or female nature
Term
hermaphrodites
Definition
 An organism having both male and female organs, therefore, is capable of producing both male and female gametes
(organism that makes both egg and sperm @ the same time)
Term
pseudo hermaphrodites
Definition

partial development of the genatalia of both sexes in one individual

 

genetlia doesnt produce both gametes for 2 sexes

Term
transvestites
Definition
 the practice of cross-dressing, which is wearing the clothing of the opposite sex.
Term
gender dyphoria
Definition
an occasional or a constant feeling of being another gender than what indicted by given genitalia
Term
homosexuality
Definition
 is romantic or sexual attraction or behavior among members of the same sex/gender
Term
how many chromosmes do we have
Definition
46
Term
2
Definition
how many are sex chromosomes
Term
how many are sex autosomes
Definition
44
Term
SRY: sex determining region Y 
Definition
determines the sex of an individual by its presence or absence

the father has this chromosome therefore he determines the sex of the baby
Term
gonads
Definition

organs in which meosis occurs in tot produce gametes

 

sex cells producing tissue

 

girls: testes

 

boys: ovaries

 

the hypothalamus releases gonado trophin which tells teh gonads to grow

Term
nondisjunction
Definition

abnormal meotic division that results in cells w/ too many or too few chromosomes

 

not seprating the chromosomes properly

Term
turner's syndrome
Definition

XO chromosomes

 

 is caused by a missing or incomplete X chromosome

Term
Klinefelter's syndrome
Definition

an individual who has an XXO

 

A genetic disorder in males caused by having an extra x chromosome. Males with this disorder may have larger than normal breasts, a lack of facial and body hair, a rounded body type, and small testicles.

Term
cryptorchidism
Definition

when the testes dont descend

 

testes temp have to be 3 degrees lower to make viable sperm

Term
puberty
Definition
the development period when the body changes to the adult form and becomes and becomes able to reproduce
Term
maturation of males vs maturation of females
Definition
Term
hypothalamus -> GnRH -> pituitary -> LH & FSH
Definition
Term
ovulation
Definition

the periodic release of sex cells from the surface of the ovaries

 

releasing of the egg out of the grafin follicle

Term
spermatogenesis
Definition

the gametogenesis process that leads to the development of sperm

 

creation of sperm

Term
oogenesis
Definition

the production of egg cells

 

creation of eggs

Term
identical twins
Definition
, twins which are the result of a single zygote (fertilized egg) splitting into two cell masses and becoming two individuals. The twins are genetically identical and are always of the same sex (both males or both females).
Term
fraternal twins
Definition

are siblings who have shared a common uterine environment. They are due to fertilization of two different ova by different sperm.

 

2 eggs 2 sperm

Term
birth: breech birth
Definition
baby becomes turned in the uterus resulting in the feet or butt appearing 1st
Term
afterbirth
Definition
following labor the placenta is expelled
Term
methods of contraception
Definition
Term
menopause
Definition
the period when a woman's body becomes nonreproductive because reproductive hormones stopped being produced
Term
egg and sperm
Definition
the two gametes that have 23 chromosomes each
Term
6 day
Definition
how long it take 4 fertilized egg to get to the uterus
Term
the egg
Definition
is the source of nutrients for the forming fetus
Term
only one out of 4 eggs
Definition
are viable and is the largest cell in the body
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