A student claims that dominant traits are always the most common traits. Is this true? Why or why not?(1 point)

Question

Responses

Yes, dominant traits became more common over time as they are passed down from generation to generation; recessive alleles continue to become less common over time.
Yes, dominant traits became more common over time as they are passed down from generation to generation; recessive alleles continue to become less common over time.

No, dominant traits only show up if they are inherited; how common they are is not influenced by this.
No, dominant traits only show up if they are inherited; how common they are is not influenced by this.

No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.
No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.

Yes, dominant traits are called dominant because they are the most common.

Answer 1

The correct response to the student's claim is:

No, dominant traits only show up if they are inherited; how common they are is not influenced by this.

The key point is that while a dominant trait is expressed in the phenotype when at least one dominant allele is present, its frequency in the population depends on the actual incidence of the alleles in the gene pool. Dominance does not guarantee that a trait is common; it simply indicates how the trait is expressed when alleles are present. Some dominant traits might actually be quite rare in the population depending on how often the alleles are passed down through generations.

Answer 2

Which statement below correctly describes a component of sexual reproduction?(1 point)
Responses

Each parent has two alleles per trait and passes one allele to their offspring.
Each parent has two alleles per trait and passes one allele to their offspring.

Each parent has two alleles and they pass both down to their offspring.
Each parent has two alleles and they pass both down to their offspring.

Only dominant alleles are passed to offspring.
Only dominant alleles are passed to offspring.

One parent passes down the majority of genes an offspring will receive.

Answer 3

The correct statement that describes a component of sexual reproduction is:

Each parent has two alleles per trait and passes one allele to their offspring.

In sexual reproduction, each parent contributes one allele for each trait, resulting in a combination of alleles in the offspring. This is in accordance with Mendelian genetics, where each trait is determined by alleles inherited from both parents.

Answer 4

A chart shows allele combinations for brown/blonde hair: Father’s Mother, Bb; Mother’s Mother, BB; Mother, Bb; Child, bb. What allele combinations are missing?

Father’s Father
(brown hair)
Father’s Mother
(brown hair)
Bb Mother’s Father
(blond hair)
Father’s Mother
(brown hair)
BB
Father’s Father
(brown hair)
Mother
(brown hair)
Bb
Child
(blond hair)
bb
Match each person with the correct allele combination.



(1 point)
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Mother’s Father
Father
Father’s Father

BB (brown hair)
Bb (brown hair)
bb (blonde hair)

Answer 5

To determine the correct allele combinations for the family chart provided, let's review the information given and then match each person accordingly.

1. Father's Mother: Bb (brown hair)
2. Mother's Mother: BB (brown hair)
3. Mother: Bb (brown hair)
4. Child: bb (blonde hair)

From this information, we can deduce:

• The Father must also be Bb (since the combination Bb x Bb can produce a bb offspring).
• The Father's Father must be BB (brown hair), since he has brown hair and would need to provide a dominant allele.

Now, matching each individual with the correct allele combinations based on the descriptions:

• Mother’s Father: BB (brown hair)
• Father: Bb (brown hair)
• Father’s Father: BB (brown hair)

So, the inputs would be filled as follows:

• Mother’s Father: BB (brown hair)
• Father: Bb (brown hair)
• Father’s Father: BB (brown hair)

Thus, the final response will be:

Mother’s Father: BB (brown hair)
Father: Bb (brown hair)
Father’s Father: BB (brown hair)

Answer 6

somebody has to have blonde hair tho

Answer 7

I apologize for the oversight in the previous message. Let's clarify the allele combinations based on the information provided in your question, especially considering that there must be a blond-haired individual in the scenario.

Given the details:

• Father’s Mother: Bb (brown hair)
• Mother’s Mother: BB (brown hair)
• Mother: Bb (brown hair)
• Child: bb (blonde hair)

To find out who might have blonde hair among the parents, we need to correctly identify the allele combinations for each individual.

1. Since the child is bb (blonde hair), both parents (the father and the mother) must carry at least one recessive allele b.
2. This means that the Father must be Bb to pass the b allele to the child.
3. The Mother is also Bb, given that she can pass the b allele.

Now, let's identify the other individuals:

• Father’s Father: Given that he is the father of someone with brown hair (and we know his wife is Bb), he must be BB (to ensure he provides a B to his child).
• Mother’s Father: Since the mother is Bb and has one dominant allele from her mother who is BB, we cannot definitively say the mother’s father must be BB, but to get a Bb offspring (the mother), he can be:
  • Bb (which provides one B from his own parents if they are BB and Bb).

Since we need a combination that includes blond hair from the child (bb), only the child has blond hair.

So for the matches:

1. Mother’s Father: Bb (could be from BB and Bb parents).
2. Father: Bb (brown hair).
3. Father’s Father: BB (brown hair).

So the final matching should be:

• Mother’s Father: Bb (could display brown hair depending on whether he inherited a blond allele).
• Father: Bb (brown hair)
• Father’s Father: BB (brown hair)

Thank you for your patience. If you have any additional modifications or needs, I am here to assist!