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3 years ago

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Huntington's disease (hd) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetr

ance. if a father's mother had hd, what is the probability that his first child will also have hd?

1 answer:

Effectus [21]3 years ago

4 0

100% the child will also have HD, as HD is caused by the DOMINANT mutant allele. 4/4

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Drag each tile to the correct location on the chart. Each tile can be used more than once.

RideAnS [48]

Answer:

Mutations are errors in genetic information and code that cause physical and functional alterations in living organisms. Some of them may be beneficial, harmful, or not produce significant alterations (neutral).

Explanation:

When categorizing each mutation as beneficial, harmful, or neutral, it's observed that:

A mutation in the HBB gene, which codes for hemoglobin, produces red blood cells that are rigid and sickle-shaped and <u>is harmful</u>.

Sickle cell anemia is caused by the HBB gene mutation, producing crescent-shaped cells, or "YES", which are not functional and very short-lived, causing hemolytic anemia. Deformity in red blood cells can cause blockage of small-caliber arteries, causing other symptoms other symptoms related to the disease.

A mutation in the EYCL3 gene, which helps regulate eye color, produces two different colored eyes, is <u>neutral</u>.

Under normal conditions, EYCL gene determine the color of the eyes. A mutation of this gene can cause the same individual to have a green and blue eye, which is not a serious health problem, but rather aesthetic.

A mutation in the CFTR gene, which codes for a cell transport protein, causes a buildup of a thick mucus that covers the organs, which represents a <u>harmful</u> mutation.

Cystic fibrosis, a disease caused by a mutation in the CFRT gene, produces the excessive thick mucous secretion that lines up the lungs and other organs - liver, pancreas, intestine - that characterizes this condition.This causes a functional alteration of the affected organ. It is also known as mucoviscidosis.

A mutation in the LRP5 gene, which codes for a cell membrane protein, increases bone density, which<u> can be harmful</u>, when it produces symptoms or beneficial.

Increased bone density is called osteopetrosis, and depends on the LRP5 -Low density lipoprotein receptor-related protein 5- gene mutation, that can cause bone pain in childhood and adolescence in just over half of patients, but represents an increase in bone resistance and reduces the risk of fractures.

Learn more:

brainly.com/question/6911164

7 0

3 years ago

A researcher examined the response of dandelions to herbivory by rabbits. She finds that in a greenhouse with no rabbits, there

vazorg [7]

Answer:

b.

Explanation:

Based on the information provided within the question it can be said that from this info the researcher can conclude that Dandelion seed number is a constitutive defensive response to rabbit herbivory. This is mainly due to the fact that Dandelions that have been eaten by the rabbits have produced more seeds, meaning that the Dandelions defense mechanism produces more seeds when attacked in order to prevent the flower's extinction.

4 0

3 years ago

Question from Campbell Biology Chapter 23:

DerKrebs [107]

<span>D) The frequency of the strong-beak alleles increased in each bird as the drought persisted.</span>

7 0

3 years ago

lozanna [386]

B) The data will help to generate a new consensus.

Please correct me if I'm wrong!! :)

6 0

3 years ago

Read 2 more answers

HELP ME PLZ :((( IM SOOOO STUCK

emmasim [6.3K]

1)
To feel an impulse, the receptor must be sent a signal to the brain where it could be interpreted. The signal should be caught by the receptor, send into the spinal cord, then arrives at the brain.
1. Object touch the heel
2. impulses generated in the receptor cells
3. impulses transmitted through a sensory neuron
4. impulses transmitted through neurons in the spinal cord
5. impulses reach the brain
6. brain process the impulses
7. you feel the object touching your heel

2)
Nerves
Spinal cord
Brain

The nervous system is made of central nervous system and peripheral nervous system. The peripheral nervous system is made of the network of nerves. The central nervous system is the brain and spinal cord that will receive impulse and send a response afterward. While brain could send the various signal, spinal cord could only send responses for reflexes.

3)
a. the diagram is showing Neuron cell
The nervous system is made up of multiple neuron cells. The neuron cells are specialized in sending a signal. It has a long axon that could deliver the signal far away. The signal is only one way though, so you will need a different neuron for receiving receptor signal and sending a response signal.

b. Two missing labels in the picture would be: axon.
It seems both of the label pointing out to the axon of the nerve cell. Since both of it pointing the same neuron cell, it should have the same name. Axon has a role in delivering nutrient and signal across the body.

c. Myelin sheath will allow the signal to run faster. This will help in a process that needs speed like reflexes. The sheath will cover a part of the neuron and prevent the ion exchange. Myelin sheath stop in some part called node of Ranvier. This will allow the action potential to "leap" from node to node, make it travel much faster.

8 0

4 years ago