Name __________________________________________
Period ______
Non Disjunction and Karyotypes
Date _____________
Examine the non-disjunction events and karyotypes below. Answer the questions that
follow.
1. Explain what the difference is between the two non-disjunction events shown above (cite
the specific phases of meiosis in your answer).
2. What are the correct diploid and haploid numbers for this organism?
3. Below each gamete express the number of chromosomes using the correct notation.
4. Identify the cells that will result in monosomies, trisomies, or normal diploid zygotes.
5. Explain the difference between the potential impact of non-disjunction during mitosis vs.
meiosis
6. Is this karyotype from a male or a female?
7. Is this karyotype “normal”, if not, where is there a mutation and what specific type is it?
8. Explain from a cellular basis (division) how this mutation came about.
9. Can you determine the name of this syndrome and explain what some common
symptoms are?
10. Discuss the sex, chromosomal configuration and phenotypic characteristics of the
individual represented by the karyotype above.
11. Discuss the sex, chromosomal configuration and phenotypic characteristics of the
individual represented by the karyotype above.