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2 years ago

11

If two pea plants are heterozygous dominant for yellow seed color, with green seed color being recessive, what will the pea offs

pring possibly look like?

1 answer:

OLga [1]2 years ago

5 0

<span>The genotypes are 1 YY : 2 Yy : 1 yy.

The phenotypes are 3 yellow : 1 green.</span>

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The life forms exhibiting the simplest cellular structure are?

const2013 [10]

Prokaryotes are the Earth`s firs living things. This are the simplest life forms exhibiting ( showing ) cellular structures.
They exist in 2 major forms:
- Eubacteria ( most of the common bacteria that are found everywhere ),
- Archaebacteria ( ancient bacteria that live in very extreme conditions ).
Answer: Prokaryotes.

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2 years ago

Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e

cricket20 [7]

Answer:

The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.

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2 years ago

How does sulfur in the air get moved to the soil.

Andrew [12]

Answer:

Sulfur can also fall directly from the atmosphere in a process called fallout. Also, the weathering of sulfur-containing rocks releases sulfur into the soil. These rocks originate from ocean sediments that are moved to land by the geologic uplifting of ocean sediments.

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2 years ago

What could a dog living now and a car living thousands of years ago have in common?<br>

konstantin123 [22]

Answer:

movement

Explanation:

Both of them can move and can be move

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2 years ago

What prompts the prokaryote to stop replication and undergo cell division?

Musya8 [376]

When there isn't enough room in the cell for two complete molecules of DNA, the prokaryote stops replication and undergoes cell division.

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3 years ago