1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GREYUIT [131]
3 years ago
12

A man who smokes heavily has developed lung cancer. The tobacco smoke has caused mutations in some of the cells in his lungs, ma

king them unable to stop reproducing and dividing. He is worried that his children, none of whom smoke, may have inherited the lung cancer from him. Under what circumstances might his concern for his children be justified? A. If his smoking had already mutated the DNA in the cells in his lungs at the time his children were conceived, the mutations would have been passed to his children. B. If he inherited a mutation which made him more susceptible to lung cancer, it may have been present in some of the gametes he produced and passed to his children. C. If the mutation resulted from the duplication of a gene in his lung cells, his children would be at greater risk than if it were caused by a base pair substitution. D. If the smoke had caused multiple different mutations in his lung cells, it would be more likely that one or more of the mutations would be passed to his children.
Biology
1 answer:
Naya [18.7K]3 years ago
3 0

Answer:

The correct answer is: B. If he inherited a mutation which made him more susceptible to lung cancer, it may have been present in some of the gametes he produced and passed to his children.

Explanation:

  • The inheritance of genes from the parents to the offspring is mediated by the germinal cells or sex cells or gametes of the parents.
  • The genetic material present in the somatic cells of the parents are not transmitted to the offspring.
  • In the given case, the man who develops lung cancer generates some tobacco smoke induced mutations in some of the cells of his lungs.
  • The cells of the lungs are type up of somatic cells. Hence, any mutations in the genome of these cells will never be transmitted to the offspring.
  • Therefore, the children of the man will never become prone to develop lung cancer due to development of mutations in the lung cells of the man.
  • However, if the man has inherited any mutation from his parents which can increase the risk of development of lung cancer, then these mutations will be present in his germinal cells and also in some of his gametes.
  • Now, if a child is born due to the fusion of the the maternal gamete with one of these mutated paternal gametes, there is an increased chance of developing lung cancer in the child, irrespective of the fact whether he is a smoker or a non-smoker.

You might be interested in
Name three invasive species and the specific location on Earth that they are affecting.
yan [13]

Answer:

Rats - Virgin Island

Hemlock - Asia

Zebra moulds - Great Lakes

Explanation:

An alien species is one that was introduced into a new environment, but does not have harmful effects. Such alien species are considered invasive species as they begin to have harmful effects on the new habitat. Invasive species can cause damage to the ecosystem, economic harm or human health effects.

Three invasive species are as following:

  1. Rats that came on board ships to the Virgin Islands infested the islands' sugar cane fields and caused significant crop damage.
  2. The woolly adelgid hemlock is an invasive Asian insect which rapidly kills infested hemlock trees.
  3. Zebra moulds in the Great Lakes can easily cover submerged surfaces, obstructing water intakes at water treatment plants and power plants

5 0
3 years ago
Usually or average describes <br> A. Weather.<br> B. Never occuring.<br> C. Typical.
Vesna [10]

Answer:

A. Weather.

Explanation:

Usually or average are terms that are often associated with weather conditions.

Weather is the average atmospheric conditions prevalent in a particular place over a short period of time.

When forecasting weather, predictive terms like usually are employed to denote expected weather events

5 0
3 years ago
The lowest layer of the atmosphere, where weather occurs and where we live, is called the ________________.
Paha777 [63]

Answer:

Troposphere

Explanation:

The troposphere is the lowest layer of the atmosphere.

3 0
3 years ago
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment
Allushta [10]

Answer:

Peroxidase activity increases and then decreases.

Explanation:

Peroxidase activity is greatly affected by the pH factor. Peroxidase works best at the pH of 7 while decrease or increase in pH will adversely affected its activity. So when change occurs from a moderately acidic environment having pH near 6 to a basic environment, the peroxidase activity increases when reach to neutral but decreases when go further to basic environment so we can say that peroxidase activity greatly affected on the pH of the solution.

8 0
3 years ago
Read 2 more answers
An abnormal plantar reflex in an adult produces babinski's sign, which indicates ________.
e-lub [12.9K]

Damage to the corticospinal tract indicates a sign of Babinski sign. the receptor detects a stimulus that is the first event associated with reflex.   What is the first event associated with a reflex.  muscle spindle (indicates stretch on the muscle).

7 0
3 years ago
Other questions:
  • Prochlorobacteria are primitive, photosynthetic bacteria that are used in the manufacture of dairy products.
    5·1 answer
  • Luke poles of magnets attract each other true or false ​
    14·1 answer
  • Which series lists the structural components of the light-dependent reactions in order, from smallest to largest? chlorophyll ®
    6·2 answers
  • Molecules that cut dna at specific sequences are known as​
    15·1 answer
  • What organelle controls a cell's activities? nucleus mitochondria centriole
    13·2 answers
  • A plant bending towards a light source is an example of which characteristics of life ?
    15·1 answer
  • What is an organism that must eat other organisms to obtain energy called?
    14·2 answers
  • The lysosome is formed from
    10·2 answers
  • Which of the following statements is correct regarding engineering maize plants with a herbicide-resistance gene using Agrobacte
    11·1 answer
  • Prior Knowledge Questions (Do these BEFORE using the G
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!