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2 years ago

Which is needed before meiosis can begin? Group of answer choices DNA replication aneuploidy corpus luteum recombination

Biology

1 answer:

Svetlanka [38]2 years ago

5 0

Answer:

DNA replication

Explanation:

For the most part of a cell's cycle, each chromosome has only one chromatid.

Before entering meiosis, a diploid cell (which contains a set of chromosomes from one parent and another set from the other parent) first doubles its DNA, and the cell will start division with each chromosome having 2 sister chromatids.

During meiosis I homologous chromosomes (the maternal and paternal sets) separate, and during meiosis II the sister chromatids separate. As a result, 4 daughter cells with half the original diploid chromosome number and one chromatid per chromosome are produced.

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One type of active transport is called cotransport. In cotransport, the energy available from an ion moving through a transport

kompoz [17]

Answer:

b- It is a spontaneous process.

Explanation:

Passive transport is the type of transport of substances across the plasma membrane that occurs without energy expenditure and occurs spontaneously. There is no energy expenditure during passive transport because substances naturally move from the more concentrated to the less concentrated medium, ie in favor of the concentration gradient.

Substance transport occurs until concentrations inside and outside the cell are equalized.

According to this conceptualization we can conclude that the correct answer to your question is the letter B.

6 0

3 years ago

Cross a parent that is homozygous recessive for both traits (bbee) with a dihybrid (BbEe). First, draw a Punnett square in your

Bas_tet [7]

In this question, one parent is homozygous recessive (bbee) and other parent is dihybrid (BbEe)
B - black fur dominant trait
b - white fur recessive
E- black eyes dominant
e - red eyes recessive

a punnett square shows all the possible combinations of genotypes with the corresponding phenotypes that the offspring could inherit.
the genotypes and their phenotypes for the offspring are given below ;
BBEE / BbEe / BbEE / BBEe - black fur and black eyes
Bbee / BBee - black fur and red eyes
bbee - white fur and red eyes
bbEe / bbEE - white fur and black eyes

after analysing the punnett square the following results are obtained;
black fur and black eyes - BbEe- 4/16
black fur and red eyes -Bbee - 4/16
white fur and black eyes - bbEe - 4/16
white fur and red eyes -bbee - 4/16

6 0

3 years ago

Read 2 more answers

Help Please ~ 20 points

max2010maxim [7]

Nitrogen fixation is the process where atmospheric nitrogen is converted by bacteria into biologically usable forms.

plant can not take nitrogen directly from the leaves.

6 0

3 years ago

Read 2 more answers

All of the following are examples of functional groups in cells except

Crank

CH3- methyl group COOH- carboxyl group H2O- just water NH2- amino goup OH- hydroxyl group the answer is H2O

7 0

3 years ago

Which of the following will be expected to be activated during times of prolonged starvation? (select all correct answers)

Scilla [17]

Answer:

Option A

Option D

Option F

Explanation:

During the process of continuous starvation for a long period of time, the primary source of energy in body is hepatic gluconeogenesis which is responsible for producing endogenous glucose. Also lipolysis takes place in the adipose tissue to release fatty acid which is then converted into ketone bodies through though mitochondrial β oxidation and ketogenesis. The liver communicates with extrahepatic tissues, including adipose tissue and skeletal muscle and deliver glucose and ketone bodies to muscle and other extrahepatic tissues as fuels.

Hence, option A, D and F are true.

5 0

3 years ago