An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
Each offspring receives 'BE' from one parent and 'be' from the other.
Therefore, all offspring have the genotype 'BEbe'.
Filling the Punnett square results in 'BEbe' in every cell.
The offspring genotype is BE b e .
Explanation
Understand the problem We are given a Punnett square representing a cross between two mice, one with genotype BE/BE and the other with genotype be/be. Our task is to determine the genotypes of their offspring by filling in the Punnett square.
Determine the offspring genotype Each cell in the Punnett square represents a possible combination of alleles from the parents. Since one parent can only contribute 'BE' and the other can only contribute 'be', all offspring will have the genotype 'BEbe'.
Fill in the Punnett square Now, we fill in the Punnett square with the determined genotype 'BEbe' for each cell.
Examples
Understanding Punnett squares is crucial in genetics. For example, if you're breeding plants for specific traits like flower color or disease resistance, a Punnett square helps predict the likelihood of those traits appearing in the offspring. This is widely used in agriculture to develop crops with desired characteristics.
In 30 seconds, an electric device delivering 15.0 A of current allows approximately 2.81 × 10²¹ electrons to flow through it. This is calculated by determining the total charge passed and then dividing by the charge of a single electron. Understanding these calculations is essential for studying electric circuits.
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