Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

LD BIO CH 21

LD Biology Chapter 21 Meiosis & Sexual Reproduction

TermDefinition
GAMETES the haploid cells that fuse with other haploid cells to form zygotes; the sperm cells or egg cells
FERTILIZATION the fusion of the nuclei of the male and female gametes
ZYGOTE the diploid cell resulting from fusion of two gametes
MEIOSIS cell division in diploid cells that results in haploid cells; reduction division
SOMATIC CELLS the body cells, as distinguished from the sex cells
HOMOLOGOUS CHROMOSOMES a pair of chromosomes having the same size and shape and carrying alleles for the same traits
DIPLOID having two sets of chromosomes, or all the homologous chromosomes that are characteristic of the species
HAPLOID having one chromosome from each pair of homologous chromosomes
SYNAPSIS the pairing of replicated homologous chromosomes during prophase I of meiosis
TETRAD the group of four chromatids formed in prophase I of meiosis
DISJUNCTION the separation of homologous chromosomes during anaphase I of meiosis
CONJUGATION a form of sexual reproduction found in protists, individual organisms appear to be identical but are of different mating types
ZYGOSPORE a zygote covered by a thick, protective wall
GONADS in animals, the specialized organs in which gametes develop
OVARIES in animals, the female gonad, which produces egg cells
OVA egg cells
TESTES the male gonads, which produce sperm and secrete male sex hormones
SPERM CELLS the male gametes
HERMAPHRODITES the individual organisms that possess both testes and ovaries
GAMETOGENESIS the process by which gametes develop in the gonads.
OOGENESIS the formation of eggs in the ovaries
SPERMATOGENESIS the formation of sperm in the testes
OOTID the large, haploid daughter cell produced by the meiotic division of the secondary oocyte; matures into an egg
SPERMATOGONIA diploid cells in the testes, from which sperm are formed through meiosis and differentiation
EXTERNAL FERTILIZATION the process in which eggs are fertilized outside the body of the female
INTERNAL FERTILIZATION the process in which eggs are fertilized inside the body of the female
PARTHENOGENESIS the development of an unfertilized egg into an adult animal without fusion with sperm
PROPHASE I crossing over begins
METAPHASE I tetrads line up at the equator
ANAPHASE I disjunction occurs
TELOPHASE I synapsis occurs - daughter cells form, but chromosomes are in replicated form
PROPHASE II centromeres attach to spindle
METAPHASE II chromosomes (not tetrads) line up at equator
ANAPHASE II centromeres divide and sister chromatids separate
TELOPHASE II both daughter cells divide, forming haploid cells
Created by: desilva13
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards