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2 years ago

When heterozygous advantage exists, how would you describe the fitness of the heterozygous genotype?

1 answer:

4 0

When heterozygous advantage exists, the fitness of the heterozygous genotype has higher fitness than either homozygote.

<h3>What are genotypes and phenotypes ?</h3>

A person's genotype is made up of all the alleles they have for a certain gene. The sum of a person's attributes or observable characteristics is their phenotype. The phenotype of an organism is only impacted by its genotype, which is directly inherited from its parents.

<h3>Types of genotype :</h3>

There are three different genotype types: homozygous dominant (PP), homozygous recessive (PP), and heterozygous (Pp). The traits are the same in homozygous dominant and heterozygous genotypes.

<h3>Heterozygous</h3>

The existence of two unique alleles at a specific gene locus. One normal allele, one mutant allele, or two separate mutant alleles may be present in a heterozygous genotype.

<h3>Homozygous </h3>

Contrary to a heterozygous genotype, a homozygous genotype exists. You inherited two copies of the same allele if you have a gene called homozygosity. In other words, both of your biological parents contributed the same variations.

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Match the reactants and products with the correct HALF of PSN.

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3 years ago

Turtles Ahoy! (A real implementation of the scientific method) Did you ever wonder how baby sea turtles can run down into the oc

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The scientific method is a research method that involves the question and problem definition, hypothesis formulation, goals, defining variables, collecting data and analysis, discussion, and conclusion.

<h3>What are the steps of the scientific method?</h3>

There are different steps to follow in a scientific method

Previous knowledge about the study object.

Definition and problem statement. The question for which there is no answer yet. A question the investigator wants to answer.

Goal especification. The goal is what the investigator wants to know.

Hypothesis formulation. The researcher hypothesizes in order to predict what is going on or what is expected to occur.

Experiment. Different variables influencing the proyect are considered. Data collection and analysis stages. This step involves testing the observations.

Results

Discussion and hypothesis verification. This step involves the deriving of the working hypothesis.

Conclusions.

<h3>What is a hypothesis?</h3>

A hypothesis is a scientific conjecture, not verified, that requires corroboration. It must be objective. Usually, it is written in the present time.

It is a claim of how it works a relationship between two or more variables. There must be a logical relationship between the involved variables.

<h3>What are dependent and independent variables?</h3>

When conducting an experiment, we must always consider the involved variables.

Independent variables are those modified or changed by the researcher to study how this change affects another variable and hence the results. This variable is not affected by any other one but influences or causes a reaction in other variables.

The dependent variable is the one influenced by the independent variable, and is affected by any change on this last one. Its response might be either directly proportional or inversely proportional to the change in the independent variable.

In the exposed example,

1. <em>Circle and label the question that is going to be investigated</em>.

How can sea turtles orientate into the ocean after hatching, paddle thousands of miles across the North Atlantic, and find their way back years later to the same beach they were born?

2. <em>What is the hypothesis</em>?

Turtles use Earth's magnetic fields and waves to orientate themselves in the water and on the ground.

3. <em>What is the independent variable</em>?

The magnetic field orientation.

4. <em>What is the dependent variable</em>?

Direction in which the turtles swim.

5. <em>What are the constants</em>?

Large glass tank filled with water and total darkness.

6. <em>Describe the data and analysis</em>.

Data,

Under normal magnetic field, the turtles swam towards the notheast.

Under reversed magnetic field, the turtles swam toward the southwest.

Analysis,

Turtles follow magnetic north and east, even when the magnetic field orientation is reversed.

7. <em>What is the conclusion</em>?

The hypothesis is accepted. Turtles use Earth's magnetic fields to orientate themselved moving between the magnetic north and east.

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5 0

1 year ago

What structure is most important in forming the tetrads?

Vladimir79 [104]

Answer:

The correct answer will be option- synaptonemal complex.

Explanation:

The tetrad arrangement of the genetic material in an organism is mediated by a highly conserved structure known as the synaptonemal complex. The synaptonemal complex is formed during the prophase I of the meiosis I which attaches the chromatin of the homologous chromosomes.

The synaptonemal complex is a proteinaceous structure which is formed by the two lateral ladders like elements with a central portion composed of the central element. The chromatin gets attached to the lateral elements while the central a portion bridge space between the two ladders thus help in the formation of the tetrad.

Thus, option- synaptonemal complex is the correct answer.

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3 years ago

Please HELP////2. A couple are both phenotypically normal, but their son suffers from hemophilia, a sex-linked recessive disorde

katrin [286]

Answer:

1/4 suffer from hemophilia

1/4 are heterozygous

Explanation:

So since they are normal but their son isn't it is assumed that the mom is the carrier since the dad has to be X^HY

X^HY x X^HX^h

Set up a pedigree

X^HX^H X^HX^h

X^HY X^hY

1/4 suffer from hemophilia (X^h)

1/4 are heterozygous (X^HX^h)

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2 years ago