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san4es73 [151]
3 years ago
5

What is testcross meaning in biology terms

Biology
1 answer:
oee [108]3 years ago
5 0
A cross between an individual exhibiting the dominate phenotype of a trait and an individual that is homozygous recessive for that trait in order to determine the genotype of the dominant individual. <span />
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thyroid

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A gardener is experimenting with one of her African violet plants. This plant produces large, deeply colored flowers. She shows
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The offspring with large, deeply colored flowers is produced from vegetative reproduction which the offspring with small, lightly colored flowers is produced from sexual reproduction.

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Reproduction of a plant is the propagation of that plant and it occurs via the sexual or asexual means. The asexual means also called vegetative reproduction involves only one parents and the resulting offspring grows from a part of this parent. Sexual reproduction involves the union of sex cells from two parents (male and female).

In asexual or vegetative reproduction, the offsprings are genetically identical to the parent they emanate from while in sexual reproduction, the offsprings can be genetically different due to the process of recombination that occurs in gametes during their formation (meiosis). This allows for genetic variation among the offsprings.

Therefore, the offspring that resembles the parent i.e. large and deeply colored was likely produced by the vegetative or asexual means of reproduction while the offspring that exhibited a different characteristics from the parent was produced from sexual reproduction.

3 0
3 years ago
Designing an Experiment
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Match the human activity with how it intensifies the greenhouse effect . (Sorry couldn’t get a better photo)
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1: Burning of fossil fuel

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3: Waste disposal in landfills

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Burning of fossil fuel is the one of the primary cause of increased level of carbon dioxide in air. Deforestation refers to uncontrolled cutting down of trees which in turn increases the level of carbon dioxide in air. Plants are the natural resources that remove the carbon dioxide from air through the process of photosynthesis. Waste disposals in landfills emits methane which is one of the greenhouse gas.

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