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3 years ago

Which of the following represents a possible chromosome number of a species that uses sexual reproduction, and why?

Biology

1 answer:

Ann [662]3 years ago

3 0

Answer:

B. 62, because this number will create a haploid cell, allowing both female and male gametes to be combined.

Explanation:

Sexual reproduction involves two organisms to come together (male and female). Sexually-reproducing organisms make use of a process called MEIOSIS to produce gametes or sex cells, which have a reduced number of chromosomes as the parent cells producing them.

A sexually reproducing organism must contain a complete diploid chromosome number (2n) that allows it to produce cells with a haploid chromosome number via meiosis. The haploid gamete cells that result from each meiotic divisions of male and female parents can combine to form a whole diploid organism.

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Heterozygous male guinea pigs with black, rough hair (BbRr) are crossed with heterozygous female guinea pigs with black, rough h

GrogVix [38]

Remember for a di hybrid cross with two completely heterozygous parents, the phenotypic ratio will always be 9:3:3:1
9 will always display both dominant traits, black and rough hair. 3 will display black hair and smooth hair and 3 will display not black hair and rough hair and 1 will display both receive traits

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4 years ago

A student observed a specimen through a light microscope.He used the objective lens marked

eduard

Ans

400=x*40

x=400/40=10

ans = x10

Explanation:

total magnification=eyepiece magnification*objective lens magnification

eye piece=total/objective lens

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3 years ago

Tony, age 28, reentered the hospital for high-dose chemotherapy and a bone marrow transplant for his leukemia. Bone marrow had b

Alex777 [14]

Answer: Autologous Transplant

Explanation

From the prefix AUTO, it refers to the self transplant, that is Tony gets his own stem cell. , and not from another person/ donor.

If the stem cells were from another person it is refers to as Allogeneic transplantation, that is ALLO transpant.

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3 years ago

Based on the chemical structure of cyanide, identify one type of biological macromolecule that could serve as a chemical precurs

SpyIntel [72]

Answer:

The biological macro molecule protein can serve as a precursor to the production of cyanide. 

Explanation:

Cyanides are chemical compounds that contain the cyanide group(C≡N). Based on the elements attached to the cyanide group cyanides can be classified into organic and inorganic cyanides.

In inorganic cyanides the cyanide group is present as $CN^-$ ion which makes them toxic. In organic cyanides $CN^-$ group is not present and thus they are less toxic. 

Since nitrogen is the essential component in a cyanide, a biomolecule containing nitrogen will best act as the precursor to cyanide formation.

The biomolecule protein is a long chain polymer of amino acids that contain nitrogen group. Thus proteins can act as precursor to cyanide formation. 

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3 years ago

A cross of a white hen with a black rooster produces erminette-color offspring. Which contains both black and white colors. This

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Answer:

codominance

Explanation:

Codominance is a result of cross-breeding different color animals that have the exact same DNA.

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4 years ago