Determine the predicted phenotype ratio in children of dihybrid parents that are right handed and possess free earlobes

Answers

Answer 1

Answer: The answer is 9 : 3 : 3 : 1

First, it must be taken into consideration that these two traits are not simple "one gene - two alleles", but there is an influence of several genes. However, let's imagine, for this question, that these are simple examples of dominant and recessive alleles of one gene.
R - dominant allele for right-handedness
r - recessive allele for left-handedness
RR - a right-handed individual
Rr - a right-handed individual (because R is dominant over r)
rr - a left-handed individual

E - dominant allele for free earlobes
e - recessive allele for attached earlobes
EE - an individual with free earlobes
Ee - an individual with free earlobes (because E is dominant over e)
ee - an individual with attached earlobes

Now, we have dihybrid parents. Since hybrid individuals are those that carry two different alleles of one gene, dihybrid individuals are those that carry two different alleles of two genes (di- means two).
So, the parents are Rr and Ee, which can represent as RrEe. For each gene, they can give either dominant or recessive allele.
Take a look at the attached image. There are total 16 genotypes of the children. The children that are right handed and possess free earlobes are marked with yellow color. There are in total 9 of them. The children that are right handed and possess attached earlobes are marked with green color. There are in total 3 of them. The children that are left handed and possess free earlobes are marked with blue color. There are in total 3 of them. At last, there is only one child (marked white) that is left handed and possess attached earlobes.

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How is the meaning of theory in science different from the everyday use of the term

Answers

In everyday use, theory is used to mean a guess or idea about how something works. In science we would call that a hypothesis not a theory. A scientific theory is a well sustained proposal or explanation based on facts that have been repeatedly confirmed through experiments and observations. To sum up, a theory in the real world is basically a guess, and a theory in the science world is a well though out plan that has been tested and a more intact thought.

Identify one way in which dietary preferences have shifted.

Answers

Answer:

Through cultural innovation and changes in habitat and ecology, there have been a number of major dietary shifts in human evolution, including meat eating, cooking, and those associated with plant and animal domestication.

Explanation:

Dietary preferences have shifted in many ways, including:

Increased consumption of processed foods, sugar, industrial seed oils, and poultry

Decreased consumption of butter, lard

, shortening

, dairy, fresh fruits, fresh vegetables, and red meat

Increased consumption of chicken and cheese

Decreased consumption of milk and ice cream

Increased consumption of corn-derived sweeteners

Increased consumption of foods high in energy, fats, free sugars, and salt/sodium

Decreased consumption of fruit, vegetables, and other dietary fiber such as whole grains

Debates are an important part of the election process, because they

Answers

Answer:

Debates are a critical part of election process as it allows conscious decision-making by voters. Debates also allow political candidates to focus on specific concerns in any electoral process.

Explanation:

Debates are a critical part of election process as it allows conscious decision-making by voters. Debates also allow political candidates to focus on specific concerns in any electoral process.

Some of the goals of debates in the election process include

1) To address specific issues

2) This helps political representatives persuade voters, i.e. voters who are not part of the ideology of the party or who have support for any side.

3) It helps to take informed decisions among eligible voters.

Answer:

focus on specific issues

Explanation:

Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. How high or low is the probabilty that a female child of Charles and Marie would suffer from hemophilia? A. 0 percent B. 25 percent C. 50 percent D. 100 percent

Answers

Without a pedigree chart, it is not possible to answer this question. However, given this is a HS bio class question, they are probably looking for the simplistic answer "A", zero percent, based on the erroneous notion that women cannot have hemophilia. Women carriers of a defective gene coding for hemophilia frequently do themselves have mild or moderate hemophilia and, in very rare cases, severe hemophilia.

What are two differences between a rhizoid and a rhizome?

Answers

A Rhizoid is a root like structure and a rhizome is a stem

rhizomes are the stems of higher plants and rhizoids are hair like roots

Rhizoids are root-like organ not exactly root
rhizomes are underground stem of higher plant

Susan germinated a seed and watered the growing plant regularly. The plant produced flowers in the second year and died. Which type of plant could it be?

Answers

A plant that is only alive for two years is called a biennial.

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