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Andru [333]
3 years ago
9

What phase occurs directly after g2

Biology
1 answer:
Vlada [557]3 years ago
8 0

Answer:

The phase which occurs after G2 of the cell life cycle is the M phase, also known as Mitotic or Meiotic phase, depending on the type of cell. Explanation: The cell life cycle consists of the G1 phase, S phase, G2 phase, and the M phase.

Explanation:

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How could the botanist best determine whether the genotype of the green-pod plant is homozygous or heterozygous?
murzikaleks [220]

Answer:

C

Explanation:

Homozygosity is when the two alleles (gene form) are the same while heterozygosity is when the alleles are of different types.

In a gene, an allele is capable of masking the expression of another. The allele being expressed or that masks is called the DOMINANT allele while the allele being masked is the RECESSIVE allele.

A recessive allele will only be expressed (phenotypically) if the two alleles are of the same type i.e. homologous but when a dominant phenotype is expressed, one cannot ascertain whether the organism is heterozygous or homozygous for that gene. e.g T is the gene coding for height in plant, T which represents tallness is dominant over t, representing shortness. In a heterozygous (Tt) and homozygous dominant (TT) state, the plant will be phenotypically tall but will only be short in a homozygous recessive (tt) state.

Since the plant will be tall in homozygous (TT) or heterozygous (Tt), we cannot detect the actual genotype of the plant. Hence, a test cross is done.

A test cross is a cross between a dominant phenotype and a homozygous recessive in order to determine the actual genotype of the dominant organism i.e. whether homozygous or heterozygous.

In this case involving pod color gene, since the botanist is trying to determine whether the genotype of the green pod plant is heterozygous or homozygous, it means the allele for green pod is dominant over that of yellow pod (recessive).

N.B: The recessive trait can only be expressed if it is homozygous. Therefore, the yellow pod plant has homozygous recessive genotype.

A test cross is conducted by the botanist to determine whether the green pod plant is heterozygous or homozygous by crossing it with a yellow pod plant (homozygous recessive).

If any of the offspring plants exhibit recessive traits i.e. yellow pods, it means the parent green pod plant is heterozygous but if all the offspring plants show phenotypic dominant traits i.e green pod, it means the parent green pod plant is homozygous.

8 0
3 years ago
Where does nitrogen from the atmosphere go before it enters a plant
Nana76 [90]

Answer:The nitrogen goes through the roots into the soil

Explanation:

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Did humans cause the drought in São Paulo?
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São Paulo is a city in Brazil that faced the worst drought in Brazil in the last 100 years between 2014–17.

The reason of the drought was diminished rain falls from last three third consecutive year in the region. Humans were somewhere responsible for the drought and less rainfall because this was caused by expansion of deforestation into the Amazon basin. Deforestation disturbed the environmental cycle that caused less amount of rain in São Paulo, Brazil.

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Does the machanical energy of an apple falling from a tree change​
vlabodo [156]
Yes aftwr you can est it.
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What is the purpose of B cell and T cells during specific immune response
Mila [183]

Answer:

Killer T cells release enzymes that help destroy invading foreign matter (antigens), Helper T cells, on the other hand, stimulate another type of lymphocyte known as B cells. B cells produce antibody, which is a protein made in response to a specific antigen.

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