Hemophilia is called "the royal disease" because many european royal families had members with the condition. hemophilia is a recessive, x‑linked disorder. queen victoria was unaffected by hemophilia, but was a carrier of the hemophilia gene (xhxh). supposed queen victoria's husband, prince albert, was affected with hemophilia (xhy). what is the percent probability that a son of queen victoria and prince albert would be unaffected by hemophilia?

25%

Explanation:

In a recessive X linked disorder, a woman is said be be affected if she has both the recessive alleles on X chromosome. If she has one recessive allele then she is a carrier of the disease but she is herself normal. If she has both the dominant alleles, she is considered as absolutely normal. A carrier appears normal but she has an allele which is mutated and her progeny may be affected by the disease if her husband is not normal. It happens because females have XX chromosomes as allosomes.

In contrast to this, a male is affected by the disease even if he has one mutated/recessive allele because a male has only one X chromosome and another chromosome is Y in the allosome pair (XY chromosome). There is no other X chromosome in males which can suppress the recessive allele on the X chromosome and Y does not have any allele for this trait at all.

The given question is explained in the attachment.

the backbone of the dna and rna compound is sugar phosphate.

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.