How does soil affect the surface of the earth

1 answer:

3 0

The type of soil varies from place to place on our planet and can even vary from one place to another in your own backyard. Soil erosion, caused by wind and rain, can change land by wearing down mountains, creating valleys, making rivers appear and disappear.

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How does the human system of reproduction result in people getting one copy of a sickle cell gene and one copy of a normal gene?

Bogdan [553]

Answer:

Every human has a couple of genes that will be separated when they make gametes. A baby will get one gene from each parent (one sperm and one egg).

Sickle cell gene is inherited by an autosomal recessive pattern, which means you need both defect genes to get the disease. The person with 1 defect gene can survive and live like normal. This person called a carrier because they carry one defect gene.

Someone that carries one defect gene can come as a result if you cross normal or carrier genotype (AA/Aa) with a carrier(Aa), or with homozygote recessive that carries 2 defect genes (aa). The person will get one healthy gene from the first parent with normal genes, and one defect gene from the second parent.

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2 years ago

A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR).

igomit [66]

So I don’t see answer choices here, but your answer is 50% of the offspring will be homozygous dominant with RR, and 100% of them will carry a homozygous dominant gene of Rr

If you take the two sets and put them into a punnett square, it would look like this (image attached):

When the two sets of alleles are crossed, you would end up with half of your pairs being fully dominant (RR), and the other half being dominant while containing a recessive gene (Rr). Since there’s only one recessive gene in these pairs, it gets overridden and the pair itself is dominant.

So your answer is 50% will be homozygous dominant with RR!

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3 years ago

What are valid methods of coping with stress

ollegr [7]

One way is to share your problems with a friend or parent and tell them how you are feeling. Get plenty of sleep as well and eat healthy, avoid any alcohol and drugs. Hope this helped.

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3 years ago

Read 2 more answers

a DNA strand witha base sequence of ACTTCGCATG when replicated would yield a newly formed strand of the same base sequence true

blagie [28]

Answer: and i oop and i oop

Explanation:

sksksksksksksk

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2 years ago

What controls what goes in and out of the cell?

julsineya [31]