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snow_lady [41]
3 years ago
8

In a diploid invertebrate, genes d and e are closely linked. single crossovers between these two genes occur only in one out of

40 meioses, and multiple crossovers are never observed. if an individual has the genotype de/de, what percentage of its gametes are expected to be recombinant (either de or de)? hint…only two of four chromatids in a tetrad would be affected by a single crossover.
Biology
1 answer:
Kryger [21]3 years ago
8 0
Mircosope transfer to cells
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To measure gas in a car by unit what would you measure by? Cup?Pint?Quart?or gallon.
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Sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous
Pavel [41]

Answer:

6,25%

Explanation:

Considering that the couple has a trait of sickle cell anemia, we know that both are heterozygous for the disease (Aa) and therefore can have children with the following genotypes:

Parents: Aa X Aa

Children: AA(A x A), Aa(A x a), Aa (a x A) and aa(a x a)

Knowing that sickle cell anemia only occurs in homozygous individuals, the probability for children to have the disease according to each crossing is:

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A x a = 1/4 = 25%

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a x a = 1/4 = 25%

The probability of forming each homozygous child (aa) is 1/4 or 25%. Since they are two children, the probability of both having sickle cell anemia is calculated by multiplying the probability of each, so:

1/4 × 1/4 = 1/16 = 0.0625 = 6.25%

It is concluded that the probability of a heterozygous couple for sickle cell anemia to have two children with the disease is 6.25%.

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A manager wanted to test whether the amount of noise in a clothing factory affected how
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Answer:

When seeking to determine the number of shirts made by employees subjected to noise with and without the use of headphones, the dependent variable is the number of shirts made by the employee.

Explanation:

In a study or research, the dependent variable is the result of the intervention on the independent variable, which can be modified. In the case presented, the dependent variable is the quantity of shirts made by the employees, the number of which is measured at the end of the study.

It is expected that those employees who block the noise using headphones produce a greater number of shirts than those exposed totally or partially to noise.

For the other options:

  • <u><em>The amount of noise</em></u><em>. This can modified by the use or not of headphones and is the independent variable, subject to modification.</em>
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  • <u><em>The amount of training employees need</em></u><em>. It is not the variable being studied.</em>
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