Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows the probability that 25 percent of offspring will be red-eyed males?

Answers

Answer 1

Answer:

The 2nd Punnett square in the first attachment shows a probability of 25% of having offspring that will be red-eyed males.

What is a Punnett square?

A Punnett square is a type of diagram used to represent a genetic cross and thus estimate genotypic and phenotypic proportions.

The Punnet square is useful to determine the proportion of traits for both non-linked se_x inheritance and linked se_x inheritance.

In this case, we need to have into account the presence of the recessive allele in males.

In conclusion, the 2nd Punnett square in the first attachment shows a probability of 25% of having offspring that will be red-eyed males.

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Answer 2

Answer:

Answer:

Second Punnett on the first attachment.

Explanation:

In a 4 x 4 Punnett there are a total of 4 squares. Twenty five percent (25%) of 4 is 1. This means that only 1 square out of the 4 should have the genotype that you are looking for.

Okay going at it in a biological sense. Because red eyes is dominant, we know that the allele should be represented by a capital R. It is X-linked, so it should be on the X. The problem is looking for the probability of a male offspring so the combination should be XY (this means the offspring is male, XX is for females).

So taking that all together, you're looking for the genotype combination:

$X^(R)Y$

So you need to find the Punnett that has only 1 square with this combination. The attachment shows which specific Punnett:

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the nucleus if I remember

Describe the different abiotic and biotic parts of an ecosystem. Identify and explain what organisms lie on each of the trophic levels.I have the different parts of an ecosystem but I just need help with the second part.

Answers

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A centimeter or meter smaller

Answers

$\huge{\boxed{\text{centimeter}}}$

A centimeter is much smaller than a meter.

There are actually 100 centimeters in every meter, which means a centimeter is $(1)/(100)$ of a meter. Much smaller.

A high tide occurs on Saturday at 4 pm. When should the next high tide beexpected?

A.24 hrs later
B.9 pm on saturday
C.4 am on sunday
D.6 hrs later

Answers

Answer:

C. 4 am on Sunday

Explanation:

It takes 6 hours 12.5 mins to go from high to low tides, high tides occurs every 12 hours and 25 mins apart.

A scientist finds an unusual living thing and decides to study it. Which observation indicates that the living thing is among the smallest types of living things? A.
It is multicellular.

B.
It does not have a nucleus.

C.
It possesses a membrane-bound nucleus.

D.
It possesses a hard outer shell.

Answers

The smallest living organisms which are capable of survive independently in nature are those which possesses a membrane-bound nucleus. Thus, the correct option is C.

What is a Cell?

A cell is the fundamental unit of life. It is the structural and functional unit of all living organisms. Cells are classified on the basis of its structure, function and origin.

Cells contain a nucleus which contains all the genetic material of an organism The genetic material is stored in the form of nucleic acids such as DNA or RNA. A membrane-bound nucleus is present in all eukaryotic organisms. This membrane helps to separate the nuclear material from the cytoplasm.

The presence of a nucleus is important for all the living organisms as this nucleus contains genetic information which is transferred to the offsprings and hence responsible for reproduction and maintaining the number of organisms.

Therefore, the correct option is C.

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Hi There! :)

A scientist finds an unusual living thing and decides to study it. Which observation indicates that the living thing is among the smallest types ofliving things?
A.
It is multicellular.

B.
It does not have a nucleus.

C.
It possesses a membrane-bound nucleus.

D.
It possesses a hard outer shell.

It does not have a nucleus.

An allele whose trait always shows up in the organism is called

Answers

An allele whose trait always shows up in the organism is called the answer is dominant allele.

Hello Mompauluca!

An allele whose trait always shows up in the organism is called an dominant allele.

Cheers
-Blizzard