Which of the following calculations require that you utilize the addition rule? A) Calculate the probability of black offspring from the cross AaBb × AaBb, when B is the symbol for black.
B) Calculate the probability of children with both cystic fibrosis and polydactyly when parents are each heterozygous for both genes.
C) Calculate the probability of each of four children having cystic fibrosis if the parents are both heterozygous.
D) Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both.
E) Calculate the probability of purple flower color in a plot of 50 plants seeded from a self-fertilizing heterozygous parent plant.

Answers

Answer 1

Answer: The answer is D) Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both.

The addition rule is used to calculate the probability of one of the events from multiple pathways. If you want that only one of the events happens, you will use the addition rule. In a case when you want to calculate the possibility of a child having EITHER sickle-cell anemia OR cystic fibrosis, you will use THE ADDITION RULE.
For example, in statement B) you will not use this rule because there is no either/or, but both/and. In case, B) you would use the multiplication rule.

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Which characteristic of prokaryotic organisms makes them different from eukaryotes

Answers

Answer:

Prokaryotes are the most primitive form of life that exist on earth. They came before eukaryotes.

The main difference is the presence of nucleus which is present in eukaryotes and absent in prokaryotes.

The genetic material of prokaryotes are dissolved in the cytoplasm whereas in case of eukaryotes the genetic material is in-tacked inside a double membrane organelle nucleus.

There are many more membrane bound cell organelles found in eukaryotes that are absent in prokaryotes.

the prokaryotic cells do not have a nucleus or membrane bound organelles

Which of the following is NOT an example of chemical weathering?a. natural plant acid breaking down a rock
c. oxidation of metals
b. acid rain deteriorating a marble statue
d. ice wedging in rock

Answers

The correct answer is "a. natural plant acid breaking down a rock" because physical weathering breaks down rocks and chemical tears down rocks.

Answer:

The answer is D. ice wedging in rock

Explanation:

How many neurons are found in the human body?

Answers

There are about 100 billion neurons in the brain

CRISPR-Cas9 technology is very innovative and made a breakthrough in biomedical science. What aspect of CRISPR-Cas9 making special from traditional PCR-based base changes? Briefly describe.

Answers

Here we go I got this for you:

CRISPR-Cas9 technology is indeed groundbreaking in biomedical science, and its key distinction from traditional PCR-based base changes lies in its precision and versatility.

**Precision:** CRISPR-Cas9 allows for highly specific and targeted modifications to an organism's DNA. It can precisely edit or replace individual DNA sequences with a high degree of accuracy. In contrast, traditional PCR-based methods are less precise and can introduce unintended mutations.

**Versatility:** CRISPR-Cas9 can be used not only to introduce base changes but also to perform a wide range of genetic manipulations, including gene knockout, gene activation, and gene insertion. It offers a versatile toolkit for genetic engineering and gene therapy applications. Traditional PCR-based methods are primarily focused on amplifying and sequencing DNA, lacking the versatility for such precise genome editing.

In summary, CRISPR-Cas9's precision and versatility make it a revolutionary tool for genetic editing, going beyond the capabilities of traditional PCR-based methods.

During cellular respiration, every living thing in this food web uses ______ gas and releases ______ back into the environment. A. carbon dioxide: oxygen
B. oxygen: carbon dioxide
C. carbon dioxide: hydrogen
D. carbon dioxide: water vapor

Answers

During cellular respiration, every living thing in this food web uses B. oxygen gas and releases carbon dioxide back into the environment.
Plants are the only living things that do quite the opposite.

B. Oxygen; carbon dioxide. Animals breathe in oxygen and release carbon dioxide.

Schleiden and schwann believed

Answers

Answer: Plants and animals were made up of same basic structure, which provided support to the cell theory.

Explanation:

Matthias Schleiden stated that plant were composed of cells, and Schwann demonstrated the same fact for animal tissues. In 1839 Schleiden and Schwann formulated the cell theory which states that organisms are composed of cells, which is the smallest unit of life. This means all tissues are made up of cells.

The conclusion is that:

All tissues are made of cells so all living organisms are composed of cells.
A cell is the smallest and basic structural and functional unit of life.
All cells arise from other cells, which already existed before.

Schleiden and Schwann both believed in cell theory. Schwann's theory was that all living things are made of cells. Schleiden believed that different parts of plant organisms are composed of cells.

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