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Vikki [24]
2 years ago
7

Use the following study to answer the following question: A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 uni

ts) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produces the largest tomato yield. Which variable is the dependent variable?
Biology
1 answer:
Rufina [12.5K]2 years ago
4 0
The weigh of each tomato is the dependent variable
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What are the phases of meiosis where crossing over occur
ehidna [41]

Answer:

Prophase 1

Explanation:

Prophase I :It can be divided into five stages:

1)Leplotene: In this stage, chromosome becomes visible and shorten as a single structure.

2)Zygotene: Homologous / sister chromosome pair up. This process is known as synapse. Synapse is the process of attachment of homologous /sister chromosome. One pair comes from the male parent while the other comes from the female parent.

3)Pachytene: Bivalents shorten.

4)Diplotene:Point of attachment of non-sister chromatids. The two chromosomes are seen to be joined at several points along their length. These points are known as Chiasmata.(Chiasmata, a cross). The paternal gene A, B, C may swap for the maternal gene a, b, c for instance, leading to a new gene combination in the resulting chromatids. This is referred to as *CROSSING OVER*.

5)Diakenesis: Homologous centromere move apart.

So, crossing over occurs in *Prophase 1.

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3 years ago
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MrMuchimi

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Explanation:

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