WebThere is no similar gene delivered by the Y chromosome. As a result, whichever allele is on the X chromosome of a male, regardless of whether it is dominant or recessive, is the allele whose trait is expressed. Hemophilia is caused by a sex-linked, recessive gene (h) in humans. Hemophiliacs cannot properly form blood clots and in the worst ... Web7 nov. 2024 · X-linked dominant disorders are caused by mutations in genes on the X ... Examples of X-linked recessive disorders are hemophilia and red-green color blindness. Hemophilia A: ... both alleles are …
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WebTo determine the frequency of the dominant allele in the population, use… p + q = 1 p + 0.4 = 1, p = 0.6 Use these allele frequencies to calculate the genotype frequencies in the females using the Hardy-Weinberg equation: P2 + 2pq + q2 = 1 0.36 + 0.48 + 0.16 = 1 Now use these frequencies in two separate Punnett squares 1) All of the offspring from a … Web5 mrt. 2024 · Few genetic disorders are controlled by dominant alleles. A mutant dominant allele is expressed in every individual who inherits even one copy of it. If it causes a serious disorder, affected people may die young and fail to reproduce. Therefore, the mutant dominant allele is likely to die out of the population. pet care games free for girls
Causes of haemophilia - NHS - NHS
Web1. A man with hemophilia (a recessive, sex-linked blood clotting disorder) has a daughter of normal phenotype. She marries a man who is normal for the trait. X H - normal X h - hemophilia Since this is a recessive disorder, one X H allele will give a normal phenotype. Webthe hemophilia gene on one X does not result in hemophilia. The presence of the normal gene that codes for the production of factor compensates for the defective gene that does not. While usually not affected, females who have the gene can pass the gene to a son who will have hemophilia. In some cases, female carr iers can have bleeding symptoms. WebD. When IA and i alleles are expressed in heterozygotes. 10. Which of the following blood group phenotypes always has a homozygous genotype? A. A B. B C. AB D. O 11. Hemophilia is caused by an X-linked recessive allele. In the pedigree shown below which two individuals in the pedigree must be carriers of hemophilia? A. I-1 and II-1 B. I-4 and … starbucks frappuccino bottle case