In the female, the development of the "egg" halts during TWO stages, _ and __

Biology

1 answer:

earnstyle [38]2 years ago

7 0

Answer: The blanks can be correctly filled up with prophase I and metaphase II.

Explanation:

In females, finite number of oocytes are present since birth. The process of oogenesis initiate in embryonic stage only. However, oogonia divide and mature to form primary oocytes. These primary oocytes start meiotic division but arrest in prophase I stage before birth.

After a girl attains puberty, one primary oocyte resumes its division each month during a menstrual cycle. The primary oocyte divides to form secondary oocyte and polar body.

Polar bodies degenerate after completing meiosis II. However, secondary oocyte halts its division again at metaphase II until fertilization takes place. Once fertilization takes place it completes its meiosis II and results into mature ovum and polar body.

You might be interested in

THER

Zielflug [23.3K]

Answer:

Spontaneous Mutations

Explanation:

6 0

2 years ago

What distinguishes one element from another?

Inessa [10]

The amount of atomic mass between them

6 0

2 years ago

50 points! b)separates sections of DNA by size in order to isolate specific genes. (1 point)

stellarik [79]

Gel electrophoresis is a technique used to separate DNA fragments according to their size. This is from Khan academy so I believe it is reliable.

4 0

2 years ago

Read 2 more answers

At what point in the development of the embryo do you think a pregnant woman must begin to increase the number of calories she c

Gekata [30.6K]

Between four and seven months

4 0

3 years ago

Read 2 more answers

how would the nervous system function be affected if both the presynaptic and postsynaptic neurons at every synapse had both syn

Ray Of Light [21]

Small, electron-lucent vesicles known as synaptic vesicles (SVs) are grouped at presynaptic terminals. They hold neurotransmitters and exocytosis, which is stimulated by calcium, releases them. After exocytosis, SVs are formed locally at the terminals.

From the presynaptic cell with synaptic vesicles to the postsynaptic cell with neurotransmitter receptors, a signal always moves in one direction across the chemical synapse.
The correct routing of nerve signals throughout the body is guaranteed by this one-way communication.
A signal is transmitted from one neuron—the presynaptic, or sending, neuron—to another neuron—the postsynaptic, or receiving, neuron—at the synapse, increasing or decreasing the likelihood that the postsynaptic neuron will fire its own action potential.
The stimulation causes a sensory neuron to go into an action potential, which alters the motor neuron's potential.
Excitatory because it tends to depolarize the cell, this potential is known as an excitatory postsynaptic potential (EPSP).

learn more about synaptic vesicles here:brainly.com/question/5865840

#SPJ4

7 0

2 years ago

In the female, the development of the "egg" halts during TWO stages, _________ and __________

In the female, the development of the "egg" halts during TWO stages, _ and __