A couple planning their family are aware that through the past th...

Question

A couple planning their family are aware that through the past three generations on the husband's side a substantial number of stillbirths have occurred and several malformed babies were born who died early in childhood. The wife has studied genetics and urges her husband to visit a genetic counseling clinic, where a complete karyotype-banding analysis is performed. Although the tests show that he has a normal complement of 46 chromosomes, banding analysis reveals that one member of the chromosome 1 pair (in group A) contains an inversion covering 70 percent of its length. The homolog of chromosome 1 and all other chromosomes show the normal banding sequence.

What can you predict about the probability of abnormality/normality of their future children?

Accepted Answer

Hello everyone here We have a question asking us which of the following statements best describes why genetically abnormal offspring are produced from unaffected carriers of inversion. A normal chromosomes and inversion chromosomes cannot cross. This isn't true because the crossover is more likely to occur. If the inversion is large, genetically abnormal offspring are produced only of crossing over occurred between normal and inversion chromosomes. So A. Is wrong be compared to the normal chromosome, the version chromosome is more likely to end up in a gang. Meet. Individuals carrying large inversions are more likely to produce abnormal gametes because crossing over occurs within the inverted region and this occurs during my Asus one. So if there is no crossing over, then no myopic problems occur. So B is wrong. See crossovers between the inversion and the normal chromosome leads to chromosomes with deletions, deficiencies or abnormal structures. This is true. So our answer here is C thank you for watching. Bye.

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