Sea urchins exhibit a holoblastic cleavage pattern. What factor contribute to this cleavage pattern? a. The amount/distribution of yolk b. Conditional specification of the vegetal layer by large micromeres c. The angle of the mitotic spindle and its time of formation d. Maternal factors
Sea urchins exhibit a holoblastic cleavage pattern. What factor contribute to this cleavage pattern?
|
a. The amount/distribution of yolk
|
||
|
b. Conditional specification of the vegetal layer by large micromeres
|
||
|
c. The angle of the mitotic spindle and its time of formation
|
||
|
d. Maternal factors |
After fertilization, the zygote undergoes a series of mitotic divisions called cleavage, where the egg cytoplasm is divided into numerous small, nucleated cells called blastomeres, and it further develops to form a multicellular organism. The cleavage can be holoblastic or complete cleavage, meroblastic or incomplete cleavage. Holoblastic cleavage is classified into isolecithal (radial, spiral, bilateral, rotational) and mesolecithal. Meroblastic cleavage is divided into telolecithal (bilateral, discoidal) and centrolecithal cleavage.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
