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3 years ago

Penelope is adding fractions while taking a math test. Which part of her brain is at work

Biology

2 answers:

oee [108]3 years ago

7 0

Cerebrum it helps you think to solve problems and its also helps you read and write, and, learn.

ludmilkaskok [199]3 years ago

3 0

Answer:

The correct answer would be cerebrum.

In humans, cerebrum is the largest and principle part located in the anterior region of the skull. It is the main site for sensory processing, control and coordination of voluntary movements, language, learning and memory.

It can be divided into four lobes or sections namely:

Frontal lobe: It is associated with planning, reasoning, emotions, speech, movement, and problem solving.
Parietal lobe: It helps in controlling and coordinating orientation, movement, perception of stimuli, and recognition.
Occipital lobe: It helps in visual processing.
Temporal lobe: It is associated with memory, speech, perception and auditory stimuli.

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La polidactilia en la especie humana se debe a un alelo dominante. Entre Francisco y Martha, ambos abuelos de Santiago, uno de e

lesya [120]

Answer:

Abuelo/a con polidactilia heterocigoto, Pp
Abuelo/a normal, pp
Juan normal, pp
Esposa de Juan con polidactilia, PP o Pp
Santiago con polidactilia, Pp

Explanation:

Datos disponibles:

Polidactilia es causada por un alelo dominante, P.
El alelo recesivo p produce numero normal de dedos.
Francisco y Martha → Abuelos → uno de ellos con polidactilia
Juan → Hijo → Normal, pp
Santiago → Nieto → Polidactílico

Uno de los padres, ya sea Francisco o Martha, es polidactílico, lo que implica que ésta persona tiene, por lo menos, un allelo dominante en su genotipo, P- (El simbolo "-" esta representando un alelo dominante o uno recesivo).

Si Juan es normal, entonces su genotipo es pp, lo que significa que recibió un alelo recesivo de su padre y otro de su madre. Es decir que el parental policactílico es heterocigota, de forma que pudo heredarle un alelo recesivo a Juan. El otro parental probablemente sea normal, pp, pudiendo solo heredarle a Juan el alelo recesivo.

Entonces, uno de los padres tiene genotipo Pp (heterocigota) y el otro pp (homocigota recesivo).

Juan es norma, pp.

Santiago, hijo de Juan, es polidactílico, lo que implica que lleva en su genotipo por lo menos un alelo dominante, P. Pero Juan solo pudo heredarle un alelo recesivo, p. Por lo tanto, Santiago es heterocigota para la característica, Pp, y heredó el alelo dominante de su madre, que puede ser homcigota dominante PP o heterocigota Pp.

Supongamos que Francisco es polidactílico y Martha normal.

1º Cruza: Francisco x Martha

Parentales) Pp x pp

Gametas) P p p p

F1) 1/2 = 50% Pp

1/2 = 50% pp → Juan

2º Cruza: Juan x Esposa (opción uno: esposa homocigota dominante)

Parentales) pp x PP

Gametas) p p P P

F2) 4/4 = 100% Pp → Santiago

2º Cruza: Juan x Esposa (opción dos: esposa heterocigota)

Parentales) pp x Pp

Gametas) p p P p

F2) 1/2 = 50% Pp → Santiago

1/2 = 50% pp

6 0

3 years ago

Using homologous structures and any other information (from notes, activities, etc),

Art [367]

evolution is fundamentally unpredictable.the theory of evolution as it is used here refers to "macroevolution'a theory is meant to both explain and predict;the theory of evolution only explains .the theory of evolution is not a theory and it is suggested calling it a working hypothesis:the working hypothesis of evolution

5 0

3 years ago

Natural selection is least likely to be the cause of a change in a population's allele frequencies when:

cricket20 [7]

The answer is B, since the population has no genetic variation it will be classified as an artificial selection not a natural selection.

7 0

3 years ago

Which of the following is true of fertilization in conifers? (2 points) The female cone releases its seeds and new gametophytes

9966 [12]

Answer:

The correct answer would be "The female cone releases its seeds and new sporophytes grow".

Conifers are sporophytes with two types of cones; pollen cones and ovulate cone.

The pollen cones are smaller in size and produce microspores which would develop into the pollen grains.

The ovulate cones are larger in size which produce megaspores which would develop into ovule.

The two gametes fertilized to produce a diploid zygote which develops into the embryo.

The fertilization takes place in the ovule and thus, embryo or seed is developed in the female cone.

The female cone then releases its seed which grows into a new sporophyte.

3 0

3 years ago

The term heterochromatin refers to heavily condensed regions of chromosomes that are largely devoid of genes. Since few genes ex

storchak [24]

Answer:

The correct answer is: S phase.

Explanation:

DNA can be divided into two functional forms: heterochromatin and euchromatin. Heterochromatin refers to the DNA that doesn't code for proteins or RNA, and thus it remains heavily condensed, for there would be no use to use it for transcription or translation. Euchromatin, on the other hand. is the DNA with the genes that can be transcripted into RNA and translated into proteins; for this reason, Euchromatin is less compact than Heterochromatin.

The only point in the cell cycle where Heterochromatin would be decondensed is S phase because, in this part of the cell cycle, the DNA gets replicated in order to prepare for Mitosis. For DNA to be replicated, it first needs to be decondensed to their two strands can be separated and used as guides for the synthesis of the two new strands.

8 0

4 years ago