5. Rett syndrome is an X-linked dominant trait. a. What are all the possible genotypes for a female with Rett syndrome? b. What are all the possible genotypes for a male with Rett syndrome? c. What are all the possible genotypes for an individual (female or male) WITHOUT Rett syndrome? d. What is the probability of having the following offspring from a cross involving a heterozygous female with Rett syndrome and a male without Rett syndrome? i. A female child with Rett syndrome___________________ ii. A female child WITHOUT Rett syndrome ________________ iii. A male child with Rett syndrome___________________ 6. Why are males affected more frequently than females by X-linked genetic disorders?
Added by Gregory C.
Step 1
Since Rett syndrome is an X-linked dominant trait, a female with Rett syndrome can have one of the following genotypes: heterozygous (X^RX^r) or homozygous dominant (X^RX^R). b. A male with Rett syndrome can only have one possible genotype: hemizygous dominant Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 57 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Rett syndrome is a dominant X-linked disorder and Duchenne's muscular dystrophy (DMD) is an X-linked recessive disorder. Both disorders show complete penetrance and are rare in the population. Kate and her husband Jeff both have brothers suffering from DMD. None of their grandparents are affected by DMD; however, Kate's father has Rett syndrome. If Kate and Jeff have a child, what is the probability that the child has DMD but not Rett syndrome? Assume that the genes for DMD and Rett syndrome are completely linked. a) 0 b) 1/8 c) 1/16 d) 3/16
Adi S.
Rett syndrome is a severe $X$ -linked recessive disorder that affects mostly female children. How does X inactivation explain this observation?
Genes on the X chromosome can be dominant or recessive. If XX individuals can be carriers, is the allele dominant or recessive? Recessive. One variety of muscular dystrophy is X-linked and recessive. Nearly all affected individuals are males. Why is this the case? Briefly explain. If a woman without muscular dystrophy and a man without muscular dystrophy have an affected child, what were the parental genotypes? What are the odds that a second child will also have muscular dystrophy?
Anand J.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD