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olga2289 [7]
2 years ago
5

What are the student’s observations and inferences before he starts his investigation?

Biology
1 answer:
Andru [333]2 years ago
3 0

Answer:

Hypothesis. A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.

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Predict phenotypes associated with nondisjunction of sex chromosomes.
Mnenie [13.5K]

Answer: The new daughter cells will have an abnormal amount of genetic material. That is called aneuploidy and it is the presence of an abnormal number of chromosomes. Different clinical conditions are the result of this nondisjunction.

Explanation:

Normal cells are diploids, that means they have two copies of each gene, one of each chromosome. So normal cells have two homologous chromosomes, one from each parent.

During anaphase of cell division, each pair of chromosomes is separated  by the mitotic spindle. The separated chromosomes are then pulled by the spindle to opposite poles of the cell, and eventually will end up in the new daughter cells.

Nondisjunction is the failure of homologous chromosomes to separate properly during cell division, so it is the miss segregation of them. The new daughter cells will have an abnormal amount of genetic material. <u>Different clinical conditions are the result of this nondisjunction.</u>

Sex chromosomes participates in sex determination of an individual. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY) So nondisjunction of sex chromosomes could be:

  • XX: one cell with no chromosome and the other cell with two X chromosomes.
  • XY: one cell with no chromosomes and the other cell with XY chromosomes.

According to which gametes are fused during fertilization, different phenotypes can be given. For example, if a gamete with one chromosome fuses with another gamete with two chromosomes, the result will be an individual with three chromosomes (it could be XXY, or XXX) called trisomy.

Triple X syndrome is characterized by an extra X chromosome in females. Those affected are often taller than average, but most females have a normal sexual development. Klinefelter syndrome is known XXY individuals, and it causes infertility in males, breast growth, less body hair and weaker muscles.

And if a gamete with no chromosome fuses also with another gamete with no chromosome, the result is a nullisomy. But due to the lack of genetic material, the nullisomic gametes are rendered unviable for fertilization.

And if a gamete with no chromosome fuses with another gamete with one chromosome (normal) the result is a monosomy, the presence of only one chromosome from a pair. The result can be an individual who is X or Y. People with Turner syndrome have one X chromosome and it is the only monosomy that is seen in humans because other cases monosomy are lethal.

Any of those examples is called aneuploidy and it is the presence of an abnormal number of chromosomes.

3 0
3 years ago
categorize the following characteristics based on whether they are describing chloroplasts or mitochondria.
Ghella [55]

The categorization of the characteristics based on whether they are describing chloroplasts or mitochondria are as follows:

  1. <u>Mitochondria:</u> carry out cellular respiration.
  2. <u>Chloroplasts:</u> carry out photosynthesis.
  3. <u>Mitochondria:</u> found in plant and animal cells.
  4. <u>Chloroplasts:</u> produce carbohydrates used as source of food for most living things.  
  5. <u>Mitochondria:</u> abundant in human muscle cells.
  6. <u>Chloroplasts:</u> not found in animal cells.
  7. <u>Chloroplasts:</u> contain chlorophyll.

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

A cell can be defined as the fundamental functional, structural and smallest unit of life, which is found within the body of an organism.

Some examples of cell organelles that are found in the body of an organism include the following:

  • Mitochondria.
  • Nucleus.
  • Endoplasmic reticulum (ER).
  • Vesicles.
  • Cytoplasm.
  • Cell membrane.
  • Chromosome.
  • Golgi apparatus (bodies).
  • Chloroplast

<h3>What is mitochondria?</h3>

Mitochondria can be defined as one of the cell organelles that is found in the body of a living organism.

Also, mitochondria is known as the powerhouse because it is saddled with responsibility of providing all the energy required in the cell, especially by transforming energy forms through series of chemical reactions.

Read more on mitochondria here: brainly.com/question/14861274

#SPJ1

<u>Complete Question:</u>

Categorize the following characteristics based on whether they are describing chloroplasts or mitochondria.

Chloroplasts Mitochondria

Carry out cellular respiration

Carry out photosynthesis

Found in plant and animal cells

Produce carbohydrates used as source of food for most living things  

Abundant in human muscle cells

Not found in animal cells

Contain chlorophyll

3 0
1 year ago
A laboratory cat could be made to twitch its whiskers by direct stimulation of the ________ lobes of the cerebral cortex.
bagirrra123 [75]
The answer is Frontal lobes
8 0
2 years ago
All of the following adaptations could lead an organism to be successful
tamaranim1 [39]

Answer:

OB) An elephant in the savannah develops without the ability to hear. A salamander living in a cave is born without, eyesight or fully developed eyes.

Explanation:

Adaptations are gradual modifications and changes in the physical characteristics or behavior of an organism, so that it could facilitate the survival of the organism in that particular environment.

In case of elephant without ability to hear specially in the regions of Savannah where there is vast grasslands with scanty vegetation and animals, then the elephant can't hear any sound of danger like approaching calamities, also it could hear the call of other elephants, in case if the elephant becomes segregated.

In salamander, low eyesight or low vision will further add to the misery, as there is already darkness in the cave. It could fall prey to any predator or it could not be able to feed on consumable organisms as it could see properly.

7 0
3 years ago
Read 2 more answers
A. two continental plates moving together
qwelly [4]
It D. Two oceanic plates moving together
6 0
3 years ago
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