List the four basic principles of genetics that Mendel discovered in his experiments. Briefly describe each of these principles.

Answers

Answer 1

Answer: 1. Fundamental theory of heredity - Mendel discovered that traits (dominant or recessive) cannot be blended. They remain to be distinct as they are passed on to future offspring. Inheritance of such traits involves the passing of certain "inheritance units", which we now call genes or alleles.

2. Principle of segregation - Mendel said that the inheritance units of a species are separated into reproductive cells through meiosis. When fertilization occurs, the alleles reunite, but now come from two parent sources.

3. Principle of independent assortment- parents with more than one trait do not always produce offspring that have matching traits. Traits are passed on independently to subsequent generations.

4. Dominance - dominant traits have better chances of appearing on the offspring's phenotype

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Which of the following if added to this sequenceA—G—A—T—G—C—G—A—G—T—T—A—C—G—G might create an insertion mutation? A.a fat molecule B.a sugar molecule C.a DNA molecule D.an A, G, T, or C
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Inside a prokaryote such as e. coli, an opera on controls for the production of the amino acid tryptophan. what occurs in the cell in order to turn off the production of tryptophan.

Answers

Trp operon is regulated so, that when tryptophan is present in the environment, the genes for tryptophan are not expressed.

The Northern Hemisphere is warmer in spring than in winter, because in springA) the days are shorter.
B) it gets more direct sunlight.
C) the Earth is closer to the Sun.
D) it is tilted away from the Sun.

Answers

Answer:

Option (B)

Explanation:

When the tilt of the earth is towards the sun, then it is called summer in the northern hemisphere. In this position, the sunlight is directly over the earth, as a result of which it absorbs more amount of heat. Spring is the season that starts from about 21st March to 21st of June or it can be considered as the season that exists between the summer and winter. Here, a high amount of sunlight is absorbed due to which the temperature eventually rises.

This is the reason why the northern hemisphere is relatively warmer during the spring season than in winter.

Hence, the correct answer is option (B).

B. It gets more direct sunlight.

How do ciliates move?a. using psuedopods
b. using flagella
c. using cilia
d. using extensions of it's body

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Ciliates move (c) using cilia. It is a group of protozoans. Cilia is an organelle of ciliates. It is a hair-like organelle that helps the ciliate move. It is also used in many ways like food gathering. It could even be used to sweep down food to their central channel.

What element behaves MOST like magnesium?

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These would be the elements in row 2 the alkaline metals. Elements in a row usually share many qualities such as electon reactivity as well as similar characteristics like the fact that many alkaline metals are considered Cations, ions with positive charges. Some examples are beryllium and calcium.

Answer: Sr

Explanation: It’s in the same group as Mg, and elements in the same group behave similarly.

The most abundant elements in the body are hydrogen, oxygen, carbon, and what?

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Answer: The correct answer is nitrogen, calcium and phosphorus.

Explanation:

Elements are defined as the substances which are made out of same type of atoms. For Example: Hydrogen, Oxygen etc..

Human body is made up of various types of elements in which 6 are most abundant.

Almost 99% of the mass of human body is made up of mainly six elements. They are oxygen (O), carbon (C), hydrogen (H), nitrogen (N), calcium (Ca) and phosphorus (P).

About 0.85 % of mass of human body is composed of other 5 elements which are potassium (K), sulfur (S), sodium (Na), chlorine (Cl) and magnesium (Mg).

Hence, the correct answer is nitrogen, calcium and phosphorus.

Nitrogen, Phosphorous, and Sulphur. Remember the acronym CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorous, and Sulphur

Which is an interconnection of food chains in an ecosystem?A) food web
B) trophic chain
C) energy web
D) producer web

Answers

An interconnection of food chains in an ecosystem is the food web. It is the natural interconnection of food chains and a graphical portrayal of what-eats-what in a biological group. Another name for sustenance web is a buyer asset framework. The food web is also called as consumer-resource system.

The answer to this question is A) Food Web

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What happens to a cell if it is interrupted during mitosis

What is a single celled organism able to do?

The function of mRNA is toA. form ribosomes.B. carry information from genes to ribosomes.C. transfer amino acids to ribosomes.D. make DNA.

Which postmortem parameter reaches a maximum at 12 hours and is gone within 36 to 48 hours?1.Rigor Mortis 2.Cloudiness of the eyes 3. Livor mortis 4. Algor mortis