Answer:
Five hundred out of every one thousand rats would die
Explanation:
Median lethal dose LD-50 (lethal dose 50%) is used as a measure of poisoning potential of a substance. LD-50 is the dose of substance, given all at once, which causes the death of 50% (one half) of a group of test animals. LD-50 is usually expressed as the amount of chemical administered (e.g., milligrams) per 100 grams or per kilogram of the body weight of the test animal. In this example, the test animals were rats, they were administrated a certain insecticide. Administration methods that are the most common are dermal (applied to the skin) and oral (given by mouth). If the determined LD-50 is 250 milligrams per kilogram of body mass, it means that one half (five hundred) of one thousand rats would die, because we are talking about lethal doses.
I know 46 chromosomes are in body cells, and 23 are in sex cells... don't know if that helps...
Based on the punnett square, 100% of offspring would be expected to have yellow seeds (YY or Yy).
<h3>What is a punnet square?</h3>
A punnet square is a graphical representation used to determine the probability of an offspring expressing a particular genotype.
According to this question, in pea plants, the gene for the color of the seed has two alleles. However;
- the dominant allele (Y) represents yellow the recessive allele (y) represents green.
In the punnet square shown above, a pea plant with genotype YY is crossed with another pea plant with genotype Yy.
The following offsprings will be produced:
All the above offsprings have a dominant phenotype, hence, 100% of offspring would be expected to have yellow seeds (YY or Yy).
Learn more about punnet square at: brainly.com/question/23535291
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