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Evgen [1.6K]
3 years ago
14

Assume that cells that are about to undergo meiosis are treated with a chemical that blocks crossing over but does not affect th

e cells in any other way, and four viable cells are produced by the two divisions of meiosis. What will be the consequence of such a treatment?
Biology
1 answer:
kupik [55]3 years ago
5 0

Answer:

Crossing over is the phenomenon by which homologous chromosomes exchange DNA segments between them during the process of meiosis.

If crossing over did not occur, there will be no genetic variation among parents and offsprings.

If the process of meiosis did not occur, there will be lesser chances of genetic variations to occur. Each chromosome will be either from the father or the mother with no genetic diversity present in it. As a result,  genetic diversity will reduce.

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A true breeding line of green pod pea plants is crossed with a true-breeding line of yellow pod plants. All of their offspring h
andre [41]

Answer:

green is the dominant trait and yellow would only be found in the second generation when 2 passive yellow genes can come together a green or yellow or green w green trait will always be green a pea can only be yellow with 2 recessive yellow genes

Explanation:

7 0
3 years ago
This type of membrane transport moves substances against the concentration gradient from an area of low concentration to an area
sashaice [31]

<u>Answer</u>:- Active transport

<u>Explanation</u>:-

There are two types of membrane transports

1. Passive transport - this type of transport occurs without the input of any energy and the molecules move along the concentration gradients that is from <em>high concetration to low concentration.</em>

2. Active transport- this type of transport takes place to move the molecules against the concentration gradient that is from <em>low concentration to high concentration.</em>

<em>The active transport is of two types:</em>

1. <em>Primary active transport-</em> in this type of transport <em>ATP</em> is used as an energy source to move the substances against the concentration gradient.

2.<em>Secondary active transport</em> - in this type of transport the gradient formed by the active transport is utilized and it involves the movement of 2 substances at a time aross the membrane. That is the movement of one molecule is coupled to another.


  • The membrane proteins that are associated with active transport are called as <em>carrier proteins</em>. These proteins have a binding site for the molecules that they transport. Once they bind to the specific molecules, a conformation change is induced and this leads to the transport of the molecule across the membrane.

So, the <em>active transport is basically responsible for utilizing the energy from ATP and carrier proteins to move the substances across the membrane against their concentration gradient i.e. from low concentration to high concentration.</em>

5 0
3 years ago
The _______is a large, heavy bird that is rarely seen out of water.
BARSIC [14]

Answer:

hawk prolly

Explanation:

3 0
2 years ago
If cells are placed in a strong sugar solution, water will ___.
8_murik_8 [283]

Answer: Pass mostly from the cells to the sugar solution

7 0
3 years ago
Read 2 more answers
El corazón, aunque tiene cuatro cavidades, éstas no se comunican todas entre sí.
Alexus [3.1K]

La respuesta es C. Aurícula derecha – ventrículo derecho y aurícula izquierda – ventrículo izquierdo.

Explicación:

El corazón, órgano encargado de bombear sangre, se divide en dos secciones principales, cada una con una función. La primera es la cavidad derecha también llamada el corazón derecho, esta estructura incluye el ventrículo derecho y la aurícula derecha; además, esta sección recibe sangre no oxigenada y la bombea hacia los pulmones. Lo que es necesario para oxigenar la sangre. La segunda cavidad es la izquierda o corazón izquierdo que incluye el ventrículo y la aurícula izquierda; además, esta sección del corazón difiere de la cavidad derecha porque distribuye la sangre al resto del cuerpo.

7 0
3 years ago
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