O Males and females are affected equally Question 26 Which of the following is a sex-linked recessive disorder? Cystic Fibrosis Duchenne muscular dystrophy Marfan syndrome Sickle-cell disease Question 27
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- In individuals affected by cystic fibrosis, salt crystals may appear afterperspiration dries up. In addition, the disease causes respiratory disorderswhich can be both debilitating and lethal. It occurs in individuals homozygousfor recessive gene. If 2 normal parents had a daughter with the symptoms ofthis disease, and a normal son, what is the probability that he might be acarrier of the recessive gene?Express answer in fraction form.Huntington’s disease, is an incurable neurodegenerative genetic disorder that affectsmuscle coordination and some cognitive functions, typically becoming noticeable inmiddle age. It results from an autosomal dominant gene (H) and there are no carriers ofthe disease. Two parents with Huntington’s disease have an affected child. What is theprobability that their next child will be an unaffected girl if they are not double-dominant?Using the karyotype and the disorder charts below, which of the following abnormalities is true for this female? 88 あ8 AK %8 88 XK 88 器器お品 12 15 18 XX XX 19 20 21 22 Disorder Cause Turner Syndrome Patau Syndrome Edward's Syndrome Down Syndrome Triple X Syndrome Monosomy X Trisomy 13 Trisomy 18 Trisomy 21 Trisomy X O Patau Syndrome O Down Syndrome O Turner Syndrome O Triple X Syndrome O Edward's Syndrome
- The following pedigree is for a disease that is completely penetrant. For this question,do not make any assumptions of whether the disease is rare or common in the general population. Khich ƠNE of these modes is NOT possible? T O autosomal dominant X-linked dominant O autosomal recessive O X-linked recessiveA woman with achondroplasia (a dominant form of dwarfism) anda phenotypically unaffected man have seven children, all of whomhave achondroplasia. What is the probability of producing such afamily if this woman is a heterozygote? What is the probabilitythat the woman is a heterozygote if her eighth child does not havethis disorder?a. The ability to taste the chemical phenylthiocarbamideis an autosomal dominant phenotype, and the inabilityto taste it is recessive. If a taster woman with a nontasterfather marries a taster man who in a previous marriagehad a nontaster daughter, what is the probability thattheir first child will be(1) A nontaster girl(2) A taster girl(3) A taster boyb. What is the probability that their first two childrenwill be tasters of either sex?
- What is the most likely mode of inheritance for this trait? I 1 2 1 2 3 4 6 7 OLO 2 3 4 5 6 7 8 9 10 4 5 6 II E III IV 1 □□ 1 2 3 X-linked dominant X-linked recessive Y-linked autosomal recessive autosomal dominant 5Huntington's disease is caused by a autosomal dominant that is lethal in embryos in the homozygous dominant conditionIf one of your parents has the disease and the other does notwhat is the probability that you will develop the disease? assume if you inherit the Huntington's gene you will get the disease)? 1/4 0 1/2 3/4What is the relationship between individual I-1 and individual III-2? Incidence of Hemophilia homozygous dominant II homozygous recessive III grandfather-granddaughter grandmother-grandson great aunt-nephew mother-son
- Proband Sex-linked Brackets Arabic numerals Heterosis ||| E III III E III ||| Depict the birth order in a generation of offspring. The first time the condition being studied is recorded but not necessarily the first time the condition has occurred. Unusual vigor or increased function of an organism in a heterozygous state. Genes located on a sex chromosome result in sexually dependent inheritance of certain traits. Placed around a gender symbol such as a circle or square or diamond to indicate adoption. Open in Reading VHaving a widows peak is dominant W to not having one (ww)Having attached earlobes is a recessive trait (ee)- Jack and Jill are heterozygous for both traits.What's the probability of them having a child with a widow's peak and attachedearlobes?Wilma and Wally have one male child who has been diagnosed withDuchenne muscular dystrophy, an X-linked condition that results insevere atrophy of skeletal muscle. Neither parent has this condition.What is the probability that their next child will have Duchenne musculardystrophy?