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pychu [463]
4 years ago
12

What is the source of genetic material in organisms that reproduce sexually

Biology
1 answer:
Thepotemich [5.8K]4 years ago
8 0

Answer:

In sexually reproducing organisms, each parent contributes half of the genes acquired (at random) by the offspring. Individuals have two of each chromosome and hence two alleles of each gene, one acquired from each parent.

Explanation:

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Explain Mendel's law of independent assortment and how the 9:3:3:1 phenotypic ratio among the F2 of a dihybrid cross provides ev
GrogVix [38]

Answer:

Explanation:

Mendel's law of independent assortment state that two different genes assort independently in gamete formation.

To reach this conclusion, one has to do a dihybrid cross. This means that two genes responsible for different traits need to be analyzed at the same time.

1) Starting with a <u>parental generation of a cross between two pure lines</u> (homozygous for both genes) <u>with different traits</u>, a plant with yellow and round seeds (YYRR) and another with green and wrinkled seeds (yyrr). <u>The F1 will be phenotypically homogeneous (</u>yellow and round)<u>, and genotypically heterozygous (</u><u>YyRr</u><u>)</u>.

2) If the individuals from the F1 are crossed with one another,  we have to do a Punnett Square to determine the phenotypic ratio of the F2.

  • If the genes assort independently, the F1 individuals will produce their different gametes with the same probability. Each possible gamete will appear in a 1/4 proportion: YR, Yr, yR, yr.
  • The 9:3:3:1 ratio is a result of analyzing the possible phenotypes that result from the dihybrid cross.

See the attached image for an illustration of the crosses in each generation and the Punnett Square.

4 0
3 years ago
A science fair project showed that sunflowers turn towards the light throughout the day. This statement should be classified as
notsponge [240]
a fact.

Flowers tend to respond to stimuli
Stimuli are anything that causes arousal or enables an object to respond or react.

There are many different kinds of stimuli for which is different for every organism, for example, water, light and carbon dioxide are three stimuli and materials needed for photosynthesis in plants to manifest.
<span>In humans, we have nutrients or food, oxygen and water for us to survive. These are stimuli, eyes need light as a stimuli for it see and function. Nasal receptors needs smell as stimuli caused by molecular reactions of an object as a stimuli. And others.<span>
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5 0
4 years ago
Why do you think pressurized seeds and spores are a beneficial adaption for these plants and fungi?
Annette [7]

It is a beneficial adaptation since the pressurized seeds and spores spread widely, helping the organism reproduce elsewhere.   In plants, it allows them to survive better by flinging the seeds far away so that their offspring don’t compete for food. For the fungus, it allows the parent to fling the spores into the grass so that when other animals eat them, the life cycle of the fungus continues on.  These may be dispersed by the wind.

6 0
3 years ago
Read 2 more answers
6. This question is about Anna and her meals one Friday.
larisa [96]

Answer:

1. Carry a larger bottle of water (not plastic)

2. Put the egg in the sandwich??

3. Clean up with the materials she bought her lunch in.

4. Keep the unused/clean materials to clean up with next time.

5. Put the peanuts and the banana in the same package.

6. Just bring one larger drink (not 2 small bottles of water and a 250ml carton of orange juice.

Not sure if they are all right, but this is all I could think of. :)

5 0
3 years ago
What tells the story of a chemical reaction
Vladimir [108]

Answer: a chemical equation

Explanation:

4 0
3 years ago
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