A cell has 2n=8 chromosomes...how many chromosomes will this cell have in anaphase1,anaphase2,metaphase2?(meiosis)

Answers

Answer 1
Answer: The answer is 8 (anaphase 1), 8 (anaphase 2), 4 (metaphase 2).

Meiosis is a cell division which results in a reduction of the number of chromosomes in half and it consists of meiosis I and meiosis II.
Before meiosis I begins, the cell is diploid (2n) and there are 8 chromosomes. In anaphase I, the sister chromatids separate from each other to the opposite sides of the cells, and after that, there are 8 chromosomes and 16 chromatids. After telophase I, there are, however, 4 chromosomes that enter meiosis II.

Meiosis II is similar to mitosis. So, in metaphase II there is the same number of chromosomes - 4 chromosomes. But, the chromosome number must double so in anaphase II there will be in total 8 chromosomes - 4 chromosomes at the one side of the cell and the 4 on the other side. After telophase II, there are 4 chromosomes.


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Describe what produces the retrograde motion of mars as seen from the earth?

Answers

the gas that the planet produces

Which gland of the endocrine and nervous system controls the other glands in the body?

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The pituitary gland is more commonly known as the master gland because it regulates other glands in the body, such as the adrenal glands, ovaries and thyroid. The hypothalamus is what throws signals to the pituitary gland on when to inhibit and stimulate production of hormones.

The hypophysis is more commonly referred to as the master gland because it regulates other glands within the body, such as the adrenal glands, ovaries, and thyroid. The hypothalamus is what throws signals to the hypophysis on when to inhibit and stimulate the assembly of hormones.

Further explanation

Pituitary or Pituitary Gland weighs about 0.5 grams, and its normal dimensions in humans are about 10 x 13 x 6 mm. This gland is in the sphenoid bone cavity - sella turcica -. During embryogenesis, the pituitary develops partly from oral ectoderm and partly from nerve tissue. The neural component arises as an evagination from the base of the diencephalon and grows toward the caudal as a trunk without breaking away from the brain.

The pituitary gland, or pituitary, is a gland that produces certain hormones that act as a controller for various aspects of the human body. Hormones produced by the pituitary help regulate growth, blood pressure, energy production and burning, and various other bodily functions.

Before the pituitary gland produces hormones, the brain will send signals from the hypothalamus as the center of communication between glands. After that, the gland will start producing which then acts as a signal for other glands and organs to regulate their function.

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The hypophysis brainly.com/question/812599

Pituitary Gland brainly.com/question/812599

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Class: High School  

Subject: Biology

Keywords: gland, hypophysis, pituitary

When a plant produces sugars and transports them during translocation, which main plant tissues are at work?dermal and meristem
dermal and vascular
ground and dermal
vascular and ground

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The answer to the question stated above is letter D. Vascular and Ground. 
Vascular tissue comprises the xylem and phloem tissues. Xylem tissue  transports water and nutrients from the roots to different parts of the plant while phloem tissue  transports organic compounds (sugars and nutrients manufactured in the shoot) from the site of photosynthesis to other parts of the plant. 



Answer:

vascular and ground is the right answer.

Explanation:

explain the importance of the cytological markers (the translocated segment and the chromosome knob) in the creighton and mcclintock's experiment.

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Answer:

Explanation: Cytological markers such as the translocated segment and the chromosome knob play a crucial role in various biological research and applied sciences. These markers have proven to be invaluable tools for understanding genetic diversity, evolution, and gene mapping in organisms. The translocated segment, which is an exchange of genetic material between nonhomologous chromosomes, can provide insights into evolutionary relationships between species. By studying translocations, scientists can determine how different species are related and how genetic material has been exchanged or rearranged during evolution. On the other hand, the chromosome knob is a distinguishing structure found on certain chromosomes that serves as a reliable cytological marker for gene mapping and breeding programs. It facilitates the identification of specific genes associated with particular traits or diseases through cytogenetic techniques. Moreover, these cytological markers enable researchers to develop breeding strategies that aim at improving crops' yield, disease resistance, or other desirable qualities by precisely transferring particular chromosomal segments or genes identified by the presence of knobs and translocations. Hence, understanding the significance of cytological markers is vital for both basic scientific discoveries and practical applications in agriculture and medicine.

The appearance of fireflies at dusk is an example of a circadian rhythm because it a. is related to the phase of the moon
b. is related to the temperature of the air
c. happens daily
d. happens seasonally

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It is a circadian rhythm because it happens daily. That is what circadian means as a term.

the right answer is C. happens daily

The circadian rhythm is studied by chronobiology. The circadian rhythm is the study of a 24-hour period during which a number of biological and physiological mechanisms are repeated. Circadian rhythms are modeled on an internal clock that regulates the rhythm of the waking / sleeping state, the rate of nail or hair growth, the rhythm of hormone production, blood pressure, the state of alertness, body temperature ... All living organisms have a circadian rhythm.

In what way are plants in a sunny meadow and sulfur bacteria in a deep sea vent alike

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the correct answer is that both both produce carbohydrates and water. Plants to do it in a process called photosynthesis, and they produce oxygen as well and sulfur bacteria do it in a process called chemo-synthesis, and they produce sulfur apart from carbohydrates and water.

Answer:

Lesson 2: Energy Roles of Organisms

Explanation:

1. B. They both produce carbohydrates

2. B. They both obtain energy by consuming other organisms.

3. C. Carnivore, Consumer

4. A. A decomposer  breaks down organic compounds in dead organic matter, and a detritivote eats dead and decaying mater.