Lecture 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Holoblastic | show 🗑
|
||||
| show | Echinoderms and amphibians (mesolecithal - displaced radial)
🗑
|
||||
| show | Annelids, mulluscs, and flatworms
🗑
|
||||
| show | Tunicates
🗑
|
||||
| show | Mammals and nematodes
🗑
|
||||
| Cleavage | show 🗑
|
||||
| Most mammalian species | show 🗑
|
||||
| show | maternal effect factors (maternally produced mRNA’s and proteins)
🗑
|
||||
| During ______ there is an increase in cell number but there is no increase in cell size. Cleavage leads to the formation of a blastula. In a blastula blastomeres surround blastocoel. | show 🗑
|
||||
| show | Entire cytoplasm of Zygote is partitioned into cells. Seen in species with low to moderate yolk content
🗑
|
||||
| show | telolecithal and centrolecithal eggs
🗑
|
||||
| Discoidal (telolecithal) | show 🗑
|
||||
| Superficial (centrolecithal) | show 🗑
|
||||
| Meroblastic cleavage | show 🗑
|
||||
| This occurs in both ____ and ____ eggs | show 🗑
|
||||
| show | planes are parallel or right angles to the animal – vegetal axis. Produce animals that are radially symmetric i.e., sea urchins or frog. In frog site of sperm entry (180 opposite grey crescent) causes symmetry.
🗑
|
||||
| show | Blastula is formed at the 128 cell stage with the blastocoel in the animal hemisphere.
🗑
|
||||
| show | Have a blastula at 128 cell stage
🗑
|
||||
| No blastocoel is produced | show 🗑
|
||||
| show | snails - Cleavage planes are at oblique angles to animal -vegetal axis and produce a spiral arrangement
🗑
|
||||
| show | mammals - 1st Cleavage is Meridional
2nd Cleavage is Meridional in one cell and equatorial in the other
🗑
|
||||
| Fluid secreted by trophoblast causes blastocoel formation Entire structure is called the | show 🗑
|
||||
| show | blastocyst
🗑
|
||||
| show | birds. Birds have telolecithal eggs - Cleavage is restricted to small disc of yolk free cytoplasm (above the yolk)
🗑
|
||||
| Cleavage produces single layer of cells called | show 🗑
|
||||
| show | area pellucida and area opaca
🗑
|
||||
| show | hypoblast
🗑
|
||||
| show | epiblast
🗑
|
||||
| show | Drosophila. Drosophila have centrolecithal eggs.
🗑
|
||||
| A ____ is a single cell that has multiple nuclei. | show 🗑
|
||||
| Cleavage is restricted to nuclei at surface of egg. In Drosophila there are 7 rounds of synchronous mitosis. Cytokinesis does not occur yielding a single cell with many nuclei (syncytium). | show 🗑
|
||||
| Cellularization | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Normal Size Small Size show me how
Created by:
AshCha
Popular Biology sets