How do carriers/heterozygotes keep the lethal gene in population?

Answers

Answer 1
Answer: Let's say the lethal gene is represented with l, and the normal gene is represented with L.

A person with Ll, a carrier, CAN produce offspring with the genotype ll (lethal) if they have children with another carrier. (a 25% chance lethal, 50% carrier, 25% perfectly normal)

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Which is the role of the gall bladder?to provide physical digestion
to store the liquid produced by the liver
to make the liquid that is stored in the liver
to decrease the chemical digestion

Answers

Answer: to store the liquid produced by the liver

Explanation:

The gall bladder is a pear shaped organ found under the liver. It's main function is to store and transport bile to the small intestine. Bile is a yellowish brown juice which is secreted by the liver so as to facilitate the break down of fatty foods present in the small intestine. It does not directly involves in direct physical digestion of food.

On the basis of the above explanation, the role of the gall bladder is to store the liquid produced by the liver is the correct option.

Answer:

to store the liquid produced by the liver

Explanation:

Edge :3

The number of drunk driving fatalities has _____ in the last twenty-five years.a. increased
b. decreased
c. stayed the same

Answers

 Just by using current knowledge of our society today, this question explains itself for the answer choice of A. Teens think that they are capable of driving even though they only had "a few drinks". This is also the case with adults, because not all adults are responsible. Hope this helped!

Which of the following was Charles Lyell's contribution?He developed the theory of natural selection.

He formalized many principles of geology.

He organized a hierarchical classification of organisms.

He developed the principle of biological succession.

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He formalized many principles of geology. Charles Lyell was a famous geologist of his era. One of his important works was the book Principles of Geology, an exploration of James Hutton's uniformitarianism doctrine. He also supported Darwin's theory of natural selection.

In _______ mimicry, unprotected species resemble others that are distasteful.

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The answer is Batesian.

Name two ways water travels from land to enter the ocean

Answers

Answer:

Seepage; runoff

Explanation:

In nature, water is constantly circling: from the water surfaces it evaporates, travels up in the atmosphere, there it condensates, forms clouds, and then again falls to the land and water surfaces. This cycle has been going on for thousands and thousands of years and is known as the water cycle.

Now, the real question is how does the water, fallen from the clouds, on the land, travel back to the oceans.

Soil consists of multiple layers, some are water permeable, and some are not. When water (rain) reaches the soil, through tiny pores in upper permeable layers it will travel downward, deeper and deeper. This process is called the seepage. Upon reaching the water-impermeable layers, it stops, becoming part of what is known the underground water. It will continue to flow on this layer until it finds its way back on the surface, usually in a form of a spring, which will find its way to a river, and river will take that water to a sea or an ocean.

However, if the soil is to saturated with water, especially during long rainy, stormy period, or in the spring, after the snow melts. This excess water will, because of the gravity,  flow over the earth's surface, from higher (mountains) to lower (valley) areas, making its way to some valley river, which will take it further to a sea or an ocean.

Upon reaching the ocean, this land-water can again join the water cycle, again and again.

-Water evaporates and condenses into clouds, then the clouds are blown over the ocean, and it rains.
-Water from a mountain flows down and into a river. The river empties into an ocean.

Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be oval or long, with long being the dominant characteristic. The flower color trait in radishes is an example of which of the following?
A) a multiple allelic system
B) sex linkage
C) codominance
D) incomplete dominance
E) epistasis

Answers

The answer is D) incomplete dominance.

Incomplete dominance occurs when heterozygous phenotype is intermediate to the dominant homozygous and recessive homozygous phenotypes. In radish flowers, purple is intermediate to white and red flowers. So, purple 
color is characteristic for heterozygous phenotypes. When dominant red flowers are crossed with recessive white flowers, all offspring will be heterozygotic and with intermediate - purple color.

Final answer:

The flower color trait in radishes, as described in your question, is a classic example of incomplete dominance, as the offspring's phenotype (purple flowers) is a blend of the parental traits (red and white flowers).

Explanation:

The flower color trait in radishes, as described in your question, is an example of incomplete dominance. In incomplete dominance, neither allelic version of the trait is completely dominant, resulting in an offspring phenotype that is a blend of the parental traits.

In your presented case, neither the red flower trait nor the white flower trait is entirely dominant, which is why a cross between a red-flowered and a white-flowered radish produces all-purple offspring. This is a classic example of incomplete dominance in biology.

Learn more about incomplete dominance here:

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