Answer:
A heterozygous trait contains two different allelic forms of a gene in which one is a dominant allele and one is recessive allele. If there is a crossing between two plants that are heterozygous for their trait then the probability of expression of the dominant allele is 3/4.
So according to this question plants are heterozygous that means the genes would be like Pp and Pp. Here P indicates the purple color allele which is dominant and p indicates recessive white color allele.
Therefore cross between these two will give genotypes PP, Pp Pp, and pp. So according to the law of dominance that says dominant allele will express itself, therefore, probability of purple-flowered offspring is 3/4 because 3 out of four genotypes have the dominant allele.
B. Nondisjunction can lead to an incorrect number of sex chromosomes.
C. Nondisjunction is responsible for causing Huntington's disease.
D. Disorders in individual genes are responsible for Down's syndrome.
B. The radical is multiplied by a negative number.
C. 7 is added to the radical term.
D. The x-term inside the radical has a negative coefficient
Option D is correct.
D. The x-term inside the radical has a negative coefficient
The negative coefficient means a negative relation between X and Y variables i.e. increase in X will decrease Y and vice versa. So, that's why the answer to this question is the X term inside the radical has a negative coefficient.
Answer:
Because it is very rare for animals belonging to different phyla to have the same body plans as adults, which makes this characteristic extremely important for classifying living beings.
Explanation:
When classifying living beings, it is very important that scientists evaluate the embryological development pattern and body tissues. The embryological development pattern, however, can present itself in the same or very similar way in living beings that belong to phyla or to a different taxon. For this reason, the embryological development pattern alone is not enough for the classification to be efficient and correct.
On the other hand, it is very rare that adult living beings from different phyla have the same body plan. For this reason, it is favorable for scientists to use the body plan and the embryological development pattern when it is necessary to classify living beings.