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Rudik [331]
4 years ago
7

Red-green color blindness is caused by an X-linked recessive gene. In a family, the mother is a carrier of this gene while the f

ather does not have the gene. What are the possible effects on their children? Select one of the options below as your answer:
A. Half of the daughters are normal and half of the daughters are color-blind.
B. Half of the boys are normal and half of the boys are color-blind.
C. Half of the boys are color-blind and half of the girls are color-blind.
Biology
2 answers:
statuscvo [17]4 years ago
7 0

The correct answer is option B, Half of the boys are normal and half of the boys are color-blind

When a  mother carries certain X – linked recessive traits, she passes on this X-linked traits to her son and he will inherit the color vision issue have trouble distinguishing reds and greens While a daughter can be just as carrier of the trait of colorblindness and will have this form of colorblindness only when both her father and mother pass along the X-linked gene. Thus, more men than women are color blind.  

The cross for the above situation is shown below –  

XXr  x XY

XXr – Color deficiency carrier mother

XY – Father without any color deficiency

Off springs produced will be  

XX – unaffected daughter

XXr – Carrier daughter

XY – Unaffected son

XrY – Affected son

Over [174]4 years ago
6 0
B. half of the boys are normal and half of the boys are color-blind. ( boys are most likely to get color blond than girls, the girls can also be carrier like the mother)
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6 0
3 years ago
How might targeting rapidly growing cells explain common chemotherapy side effects such as hair loss and nausea
IrinaVladis [17]

Cancer cells are the cells that divide rapidly than any other cells in the body. The drugs used in chemotherapy work on rapidly dividing cancer cells. Some cells of our body apart from cancer cells also divide rapidly along with the cancer cells such as the cells that line the stomach and the digestive tract. Chemotherapy drugs cannot differentiate the cancer cells and the normal cells so these drugs also attack the normal cells which divide rapidly along with the cancer cells. The drugs also attack the cells that are present in the roots of the hair. So, this results in the hair loss. Hair loss does not occur immediately after the chemotherapy treatment instead it starts after few treatments. The degree of the hair loss after chemotherapy depends on the drug type and process. So when the chemotherapy drugs are used it results in the hair loss and nausea.

Therefore, when chemotherapy drugs attack normal cells including the roots of the hair instead of cancer cells that divide rapidly along with the cancer cells it results in the hair loss and nausea.

3 0
3 years ago
Read 2 more answers
Analyze the property of water you investigated and provide some real-world applications of the
scoray [572]

Answer:

As the type of investigation is not discussed, lets answer the question generally.

Explanation:

One of the properties of water is that water in the form of ice is less dense as compared to water liquid water. This property of water lets fishes survive in conditions when the temperature is freezing.

The hydrogen bonds in water make the water turn into a vast, honeycomb structure when the temperature is below 4 degrees Celsius. This causes the ice to float on water and the fishes can stay alive in the liquid water underneath the ice.

4 0
3 years ago
Read 2 more answers
1. How would the predation of pythons on rabbits affect the population of other large predators such as bobcats and alligators?
Inessa [10]

Q1:

Answer:

Studies have reported that due to predation of pythons on rabbits, the population of other predators is badly affected.

Bobcats are a natural predator of rabbits thus they come in a competition with pythons for food. As pythons are more powerful so they target rabbits more easily than Bobcats. The population of Bobcats has been declined by 90% or more due to the establishment of pythons in the Everglades.

<em>Alligator mississippiensis </em>or American alligators are also abundant in Everglades and just like Bobcats they compete with pythons for their food. They can even kill pythons if pythons are smaller in size than them, but python will kill alligator if he is of smaller size. Although rabbits are food for both alligator and Python but Alligator is a key stone specie and it has very important ecological role, because it digs holes in land that retain water upon rainfall. These water hole provide water in the extreme dry weather and help in survival of other small specie like insects and birds.

So, we can expect the population of Alligator, Bob cats and other small insects and birds to decline rapidly if Python population kept on increasing with same speed.

-------------------------------------------------------------------------------------------------------------

Q2:

Answer:

There is no doubt that Pythons pose serious threat for both humans as well as survival of other organisms like Alligators and birds. However, I donot think that “Python challenge” is a reasonable way to kill or remove Pythons. Because It can threat the lives of many individuals who take part in competition, although they are trained but still they are nor professionals and get training of only few weeks so it is not safe competition.

There should be some strategy of introducing natural predators like Brown beers, Cougars and Alligators which can kill python naturally without staking the life of humans at risk.


Hope it helps!

6 0
3 years ago
When the offspring has a heterozygous phenotype that is intermediate between the two homozygous phenotypes that were crossed,___
tresset_1 [31]
When the heterozygous phenotype<span> is </span>intermediate between the two homozygous phenotypes<span>, the pattern of inheritance is called incomplete dominance. Multiple Alleles. Although an individual can </span>have<span>at most </span>two<span> different alleles, a species may </span>have<span> multiple alleles of many of its genes.</span>
6 0
4 years ago
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