As the peppered moth evolved over time, its wings changed from light to dark so that it could better

Use the drop-down menus to complete the statements.

Korvikt [17]

Answer:

In the first step of meiosis I, the chromosomes/genetic material of the cell condenses into a visible form, into a form called heterochromatin. The nucleolus also disappears.

In the second step, a process called synapsis occurs. This is when homologous chromosomes align themselves, gene by gene.

In the third step, crossing over occurs. Segments of corresponding DNA are cut and exchanged between non-sister chromatids of the formed tetrads.

In the fourth step, the nucleus fragments, the nuclear envelope fragments, the two centrosomes (if we're talking about an animal cell) separate from each other as their asters and mitotic spindles (mostly microtubules (kinetochore and non-kinetochore) lengthen. The microtubules extending from the centrosomes can now connect to chromosomes.

7 0

3 years ago

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HELP!!!<br><br> What would happen to the ecosystem if polar bears were removed?

MrMuchimi

well there will be no one hunting the seals so the seals will over populate also some fish will to

3 0

3 years ago

If you want to see something in fine detail, you should focus the light on which part of your retina?

Dmitry_Shevchenko [17]

If you want to see something in fine detail, you should focus the light the cornea. The lens works together with the cornea to focus light correctly on retina.

When light hit on retina special cells called photo receptors turn the light into electrical signals. The lens are the clear part of eyes behind the iris that help to focus light and image on retina to see something clearly.Lens is the important part of eye when it comes to focusing light so that we can see perfect clear image.

The retina is the most sensitive part which can effect by more light because retina convert incoming light into electrical impulse.

To learn more about Retina here

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4 0

2 years ago

What is the difference between a unicellular organism and a multicellular organism

VikaD [51]

Answer: A unicellular organism consists of 1 single egg, and a multicelluar organism consists of 2 or more eggs.

Explanation:

5 0

3 years ago

atch the statement to the following options.A. One of a pair of chromosomes with similar genetic information and from different

Goryan [66]

Answer:

A. Homologue.

B. Chiasma.

C. Synaptonemal.

D. Synaptonemal.

E. Synapsis.

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

Synaptonemal complex can be defined as a network of proteins that is responsible for holding homologous chromosomes (homologues) together.

Generally, a synaptonemal complex (protein lattice) is formed between homologous chromosomes during mitosis and meiosis. Also, synaptonemal complex is important for the formation of the four sister chromatids referred to as tetrads.

Furthermore, the synaptonemal complex (protein lattice) has a tripartite structure which comprises of the following components;

I. SC protein-1 (SYCP1).

II. SC protein-2 (SYCP2).

III. SC protein-3 (SYCP3).

In conclusion, the synaptonemal complex plays a significant role in synapsis, recombination and chromosome pairing.

Matching the various terminologies in genetics with their description, we have;

A. Homologue: one of a pair of chromosomes with similar genetic information and from different sources like the sperm and egg.

B. Chiasma: several X-shaped structures may be visible under the microscope and indicate where crossing over has occurred.

C. Synaptonemal: a lattice of protein holds two replicated chromosomes in precise register with one another.

D. Synaptonemal: four chromatids are held together by a zipper-like structure.

E. Synapsis: a process in which pairs of homologous complex chromosomes line up side by side.

5 0

2 years ago