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2 years ago

9. Consider the below Punnett square cross. Explain how you could use it to determine which parent

Biology

1 answer:

kogti [31]2 years ago

3 0

Answer: The father determines the biological sex of a baby

Explanation: Human beings have two sex chromosomes, males have XY chromosomes whereas females have XX chromosomes. During fertilization, an egg from a woman fuses with a sperm cell from a man to form a zygote. Women have two X chromosomes (XX) and any point in time they can only release an egg bearing an X chromosome but males have one X and one Y chromosome, therefore they can either release a sperm cell with an X chromosome or a sperm cell with a Y chromosome. When an egg with X-chromosome fuses with a sperm cell with an X chromosome, the resulting baby is a female but when an egg with an X chromosome fuses with a sperm cell with a Y chromosome, the resulting baby is a male.

What makes the difference in both sexes is the Y chromosome from the man, therefore the father determines the biological sex of a baby.

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Can we detect bacteria in pollutants using DNA profiling

Blababa [14]

Yes. You could do this by adding solvents to break down any cell walls, centrifuge to separate the DNA, if you haven't got much then upscale with PCR, gel electrophoresis could be used to detect the DNA, and Sanger sequencing to find the sequence.

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3 years ago

Why might a scientist want to disrupt the plasma membrane and how might they do this experimentally?

kupik [55]

It is possible to disrupt the plasma membrane by using enzymes and/or detergent agents.

<h3>What is the plasma membrane?</h3>

The plasma membrane is a lipid bilayer that is mainly composed of phospholipids and cholesterol.

In laboratory conditions, it is possible to disrupt this lipid bilayer by using detergent and proteins (enzymes) that break the bonds binding phospholipids.

For example, enzymes can break down the double bonds that bind fatty acids in the lipid bilayer.

In conclusion, the plasma membrane can be break down by applying enzymes and detergents.

Learn more about the cell membrane here:

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2 years ago

You forgot to ask a friend to water your plants while you were on vacation. When you got home you noticed they were wilting.

Arturiano [62]

Turgor pressure.

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8 0

3 years ago

1.<br> It's good to give____<br> food to your body.

EastWind [94]

Answer:

It's good to give healthy food to your body.

Explanation:

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7 0

2 years ago

All cells of the body age and are replaced in a natural order. When RBCs age, they are destroyed in the spleen. During this proc

Ad libitum [116K]

Answer:

Bone marrow.

Explanation:

Hematopiesis may be defined as the formation of the blood cells by the precursor stem cells. This process occurs in the bone marrow, thymus and liver.

The red blood cells are enucleated cells with the minimum span of around 120 days. These cells are processed and destroyed in the spleen. The iron is recovered from the red blood cells and sent again into the bone marrow for the production of new blood cells.

Thus, the answer is bone marrow.

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2 years ago