What are the stages of Meiosis I and Meiosis II in order as the happen.

Answers

Answer 1

Answer: Prophase I

DNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope. Note that the bivalent has two chromosomes and four chromatids, with one chromosome coming from each parent.Prometaphase I

The nuclear membrane disappears. One kinetochore forms per chromosome rather than one per chromatid, and the chromosomes attached to spindle fibers begin to move.Metaphase I

Bivalents, each composed of two chromosomes (four chromatids) align at the metaphase plate. The orientation is random, with either parental homologue on a side. This means that there is a 50-50 chance for the daughter cells to get either the mother's or father's homologue for each chromosome.Anaphase I

Chiasmata separate. Chromosomes, each with two chromatids, move to separate poles. Each of the daughter cells is now haploid (23 chromosomes), but each chromosome has two chromatids.Telophase I

Nuclear envelopes may reform, or the cell may quickly start meiosis II.Cytokinesis

Analogous to mitosis where two complete daughter cells form.

Answer 2

Answer: Meiosis I:

Prophase I - Homologus chromosomes pair up (synapsis) and form a tetrad. Sometimes non-sister chromatids exchange genetic information during the process of crossing over.

Metaphase I- Tetrads line up at the center of the cell.

Anaphase I - Homologous pairs are split up.

Telophase I/Cytokinesis - Two daugher cells form that have half the chromosome number of the parent cell but each chromosome consists of a pair of sister chromatids.

Interkinesis - break period

Meiosis II:

Prophase II - A new spindle forms

Metaphase II- Each chromosome lines up at the middle of the cell.

Anaphase II - The sister chromatids are separated and move to opposite ends of the cell.

Telophase II - Two new nuclei are formed in each cell. Each nucleus contains a haplod (n) number of chromosomes.

Cytokinesis- End result of meiosis is 4 haploid daughter cells

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Can mice get fat from stress or fear? a) Yes b) No

Answers

Answer:

Although an increase in body weight can be noticed after 2 weeks, the increase is gradual and becomes apparent after 4 weeks. After 16–20 weeks of high-fat diet feeding, mouse will typically exhibit 20–30% increase in body weight when compared to chow-fed mouse (9).

Eating lots of fruitsand vegetables will
make you a faster
runner.
Independent variable?
Dependent variable?

Answers

Answer:

Independent is what youre testing so it should be eating vegetables and fruits. and Dependent is what your outcome should be the dependent variable depends on you IV (independent variables) so the DV should be whether you run faster or not.

Explanation:

___________ are lipids that store energy and are typically composed of multiple building blocks containing three fatty acids attached to a glycerol molecule

Answers

The answer would be, Fats. Since Triglycerides (3 fatty acids + 1 glycerol) are those lipids which are commonly known as lipids.

Omar wrote a hypothesis about batteries called dry cells.If more dry cells are connected end to end, a light bulb will work longer because there is more energy available.

What are the variables in his hypothesis?

Answers

The hypothesis is
If more dry cells are connected end to end, a light bulb will work longer because there is more energy available.

The variables are
the number of dry cells connected end to end
the duration of the light bulb working

Answer:

The answer is not c I believe it is A

Explanation:

What is the purpose of DNA polymerase?

Answers

The main function of DNA polymerase is to make it from nucleotides, the building blocks of DNA. There are several forms of DNA polymerase that play a role DNA replication and they usually work in pairs to copy one molecule of double-stranded DNA into two new double stranded DNA molecules.

If each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy ,how much of that energy is left after the third trophic level

Answers

The energy that is left after the third trophic level is 10 kcal.

How much of that energy is left after the third trophic level?

The first trophic level uses 1000 kcal.
The second trophic level used 100 kcal.
So, the third trophic level uses 10 kcal leaving 1 kcal.
The energy is transferred from trophic level to trophic level, and approximately 90% of it is lost each time.
With some of it being lost as heat into the environment (as a result of respiration) and some being lost as partially digested food.

Hence, if each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy, the energy that is left after the third trophic level is 10 kcal.

To know more about energy flow in trophic levels, refer to: brainly.com/question/17249801

#SPJ2

There is 10 kcal energy left in the 3rd trophic level.

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