In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence?.

X-linked genes are inherited. The affected girl's father is hemophilic (X-Y), and the mother might be either hemophilic (X-X-) or carrier normal (X+X-).

These are the genes located in the X séx chromosome and not in the somatic ones.

Traits coded by these genes are inherited. This is, X-linked genes are transmitted from parents to children through generations.

According to this, X-linked genetic disorder will be inherited as well.

Hemophilia is a X-linked recessive genetic disorder.

Let us represent the recessive allele with the symbol -, and the dominant allele with the symbol +.

For the affection to be expressed, the person must be either,

If the baby girl is found to have inherited the trait from her parents, then her genotype is X-X-. She must have received one X- chromosomes from each parent.

Options,

Cross 1) affected father x carrier mother

Parentals)   X-Y    x    X+X-

Gametes)  X-      Y    X+     X-

Punnett square)       X-       Y

                       X+   X+X-    X+Y

                       X-    X-X-     X-Y  

F1) 1/2 = 50% of the progeny is expected to be healthy (25% X+X- girls + 25% X+Y boys)

    1/2 = 50% of the progeny is expected to be hemophilic (25% X-X- girls + 25% X-Y boys)

Cross 2) affected father x affected mother

Parentals)   X-Y    x    X-X-

Gametes)  X-      Y    X-     X-

Punnett square)       X-       Y

                       X-    X-X-    X-Y

                       X-    X-X-     X-Y  

F1) 100% of the progeny is expected to be hemophilic (50% X-X- girls + 50% X-Y boys)

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here is the answer! :)

7,950 cm should be correct! sorry if its not it tried! <33

Step-by-step explanation:

if you divide 75 by 97 it should turn out

as 7,950! and there's your answer <33

have a good day!!!

Answer:

Darwin and Wallace both realized that if an animal has some trait that helps it to withstand the elements or to breed more successfully, it may leave more offspring behind than others. On average, the trait will become more common in the following generation, and the generation after that.

Explanation:

hope this helps

Answer:

Decomposer

Explanation:

Hope this helps! :)

The preserved remains would be fossils. Extinctions are entire species dying out, populations are numbers of living creatures, and species are creature classifications.

Hope this answers your question.

Answer:

I know im late but the answer is A

Explanation:

got it right on edge

have a good day

:)

Answer:

I believe the answer is C. Potenial energy

Explanation:

Earths magnetosphere is not part of it and that potential energy.

Answer:

A persistent organic pollutant

Explanation:

POPs (Persistent organic pollutants) is what how we name the organic compounds that are resistant to the environmental degradation through biological, chemical, and photolytic processes. Some organic pesticides are the most widespread Persistent organic pollutants used in agriculture worldwide.

Answer: In metaphase I, homologous chromosomes line up along the center of the cell in order to be pulled apart.

Explanation:

Meiosis is the type of cell division in the germinal cells. In metaphase I of meiosis, the homologous chromosomes line up across from each other in the center of the cell.

Metaphase I is one of the stages of meiosis I in which the duplicated homologous chromosome pairs align at the center of the cell along the midline and are connected through the centrioles.

In prophase I the homologous chromosomes are created and in anaphase I, the aligned chromosomes move towards the opposite poles so that after division each cell has the same number and equal composition of chromosomes.

Therefore, in metaphase I the homologous chromosomes are aligned at the midline.

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Answer:

Bacteria are prokaryotes, lacking well-defined nuclei and membrane-bound organelles, and with chromosomes composed of a single closed DNA circle. They come in many shapes and sizes, from minute spheres, cylinders and spiral threads, to flagellated rods, and filamentous chains.

Explanation:

Answer:

Prokaryotes,both bacteria and archaea have prokaryotes, which means that the cells don't have a nucleus or other membrane-bound organelles in their cells. Like bacteria, the cells have a coiled ring of DNA, and the cell cytoplasm contains ribosomes for the production of cell proteins and other substances the cell needs.

Explanation:

hope this helps have a good day!Also can I have brainliest

Systemic circulation involves the movement of blood from the right ventricle of the heart to the cells of the body and back to the heart through the right atrium.

It is a form of blood circulation through which functional blood is supplied to all the cells and tissues of the body.

The system starts with oxygenated blood leaving the right side of the heart through the ventricle.

The blood travels through arteries to different cells/tissues of the body, supplies them with oxygen and vital nutrients, and picks up waste materials simultaneously.

Deoxygenated blood then travels through veins back to the heart through the right atrium.

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Answer:

Transgenic

Explanation:

I did the the usa test prep

Malabsorption of some minerals, including calcium, magnesium, and zinc often occurs because the minerals form soaps with the unabsorbed fatty acids.

Minerals are parts of the nutrients made in the body or gotten from food sources that are essential for the maintenance of health and growth.

Examples of minerals are calcium, magnesium, and zinc which are capable of forming soap with fatty acids in a reaction called saponification.

Therefore when they are unabsorbed in the body, minerals form soaps with the unabsorbed fatty acids.

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Answer:

subject

Biology, 21.10.2020 16:01 jazz589729

Information about the four organisms can be found on the Internet. Use credible websites to find answers to the questions you developed in part A. Based on this data, draw your own dichotomous key. Based on the key you created, do you think some of the organisms are more closely related than others? Explain your answer.

Part 1 was this:A dichotomous key works on the principle of asking yes-or-no questions about the organism. To identify it, the answers for that organism are then compared to existing organisms to identify it. Prepare a list of four to five questions about each of the organisms listed below to help you create your own key. For each question, make sure the answer isn’t the same for all four organisms. For example, Does the organism have cells? would be an inappropriate question, because all the organisms have cells.

brewer’s yeast (Saccharomyces cerevisiae)

E. coli bacteria (Escherichia coli)

green hydra (Hydra viridissima)

house cat (Felis catus)

Here were my answers:Brewer’s yeast

Is it a unicellular organism? Yes

Is it found inside the human body? Yes

Is it visible without a microscope? Yes

Can it produce its own food? No

E. coli bacteria

Is it a unicellular organism? Yes

Is it found inside the human body? Yes

Is it visible without a microscope? No

Can it produce its own food? No

Green hydra (Hydra viridissima)

Is it a unicellular organism? No

Is it found inside the human body? No

Is it visible without a microscope? Yes

Can it produce its own food? Yes

House cat (Felis catus)

Is it a unicellular organism? No

Is it found inside the human body? No

Is it visible without a microscope? Yes

Can it produce its own food? No

Explanation:

.It is possible that Kalani is the father of Marcus but he can not be the father of Kevin.

Genotype has to do with the total number of genes that an offspring recieves from its parents. We are told that the parents here are Kalani (blood type AB) and Winnie (blood type B).

If this is the case, it is impossible to explain the fact that Kevin has blood group O.It is possible that Kalani is the father of Marcus but he can not be the father of Kevin.

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Answer:

Nutrient Pool.

Explanation:

Hope it helps bud :)

Answer:

0.51 1 MeV

Explanation:

-mec2 is the rest energy of the electron (0.511 MeV)

-Pair production and triplet production are followed by the annihilation of the positron with a ‘free’ electron producing two annihilation quanta, most commonly with an energy of 0.511 MeV each and emitted at 180º from each other to satisfy conservation of energy, momentum and charge.

The ranking of regions from high to low life quality is: O C, A, D,B since these regions show a gradation from highest to lowest in the indices of quality of life.

The quality of life is a measure how comfortable life is for individuals and how the living environmental conditions of a place which can contribute to either the prolonging or reduction of the lifespan of individuals.

The indexes for measuring quality of life include:

Based on the indices of quality of life and the data given, the ranking of regions from high to low life quality is: O C, A, D,B.

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Answer: This is the oculomotor nerve.

I hope this helps!

Answer:

D. A living organisms position in the flow of energy through an ecosystem.

Explanation:

Its like each step up in the food web/pyramid.

Trophic level is a living organism's position in the flow of energy through an ecosystem. The correct option is D.

A biological organism's place or function in the movement of energy through an ecosystem is referred to as its trophic level. It symbolises the ecological community's hierarchy of feeding.

A trophic level's inhabitants have comparable feeding habits and occupy a certain place in the food chain.

The first trophic level is occupied by the primary producers, including plants and algae, which use photosynthesis to transform sunlight into energy.

The second trophic level is occupied by herbivores that consume producers directly, followed by primary carnivores (predators that consume herbivores) on the third level, and so forth.

A complex network of energy flow and nutrient cycling occurs within an ecosystem at each trophic level as creatures consume and are consumed by one another.

Thus, the correct option is D.

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Crude oil is separated into different compounds at an Oil refinery.

The process by which crude oil is separated into different compounds is known as Fractional distillation.

And many useful products are formed ~ like petrol, gasoline, deasel, etc

Answer:

joint capsule.

Explanation:

Answer:

i belive your answer is C. electricity would lead to a higher carrying capacity

Explanation:

If the voltmeter shows a neuron's membrane potential becomes more negative, from -70 mV to -85 mV, then the neuron is experiencing a hyperpolarization phase.

The hyperpolarization phase is a stage in which potassium channels remain open while sodium channels need to reset.

This causes a change in the voltage inside the cell, which triggers a concomitant response.

The period of hyperpolarization is inversely opposite to the depolarization state of the neuron.

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Answer: Plants, animals, and decomposers (which consume dead things) are in a forest ecosystem. Scientists are studying photosynthesis in the forest. Which group or groups of organisms should they study? A jungle ecosystem has plants, animals, and decomposers (which consume dead things).

Explanation: