Dec 18, 2017 · syndrome Question 6 1 out of 1 points Which of the following results from nondisjunction of autosomal chromosomes? Answers: Selected Answer: a. Down Syndrome a. Down Syndrome b. Hemophilia c. Cystic Fibrosis d. Muscular dystrophy e. Color blindness
Autosomal nondisjunction is commonly lethal with the exception of an extra copy of chromosome in pair 21 which result to a condition that is known as down syndrome (Trisomy 21). Therefore, it is oftentimes imperative for geneticists to perform Karyotyping to analyze each chromosomes by countring and identifying their shapes and sizes. This test could either …
Question 10 1 out of 1 points nondisjunction can be. School North Lake College; Course Title BIOL 1408; Type. Test Prep. Uploaded By awsomeminecraft100. Pages 16 Ratings 100% (11) 11 out of 11 people found this document helpful; This preview shows page 3 - 8 out of 16 pages. ...
Nov 21, 2016 · Question 1 8 out of 8 points Which of these conditions is caused by nondisjunction of autosomal chromosomes? Selected Answer: Trisomy 21-Down syndrome Correct Answer: Trisomy 21-Down syndrome Question 2 8 out of 8 points Cancer cells within which of the following biopsy samples would be the best indicator that the cancer has …
Nondisjunction causes errors in chromosome number, such as trisomy 21 (Down syndrome) and monosomy X (Turner syndrome). It is also a common cause of early spontaneous abortions.Jun 3, 2021
There are three forms of nondisjunction: failure of a pair of homologous chromosomes to separate in meiosis I, failure of sister chromatids to separate during meiosis II, and failure of sister chromatids to separate during mitosis. Nondisjunction results in daughter cells with abnormal chromosome numbers (aneuploidy).
Conditions that arise from non-disjunction events include:Patau's Syndrome (trisomy 13)Edwards Syndrome (trisomy 18)Down Syndrome (trisomy 21)Klinefelter Syndrome (XXY)Turner's Syndrome (monosomy X)
These studies have shown that maternal nondisjunction accounts for significantly more cases of autosomal trisomy than does paternal nondisjunction. For trisomies 13, 14, 15, 16, 18, 21, and 22, maternal nondisjunction accounted for 88%, 83%, 88%, 100%, 93%, 91%, and 89% of cases, respectively.
When a haploid gamete does not receive a chromosome during meiosis as a result of nondisjunction, it combines with another gamete to form a monosomic zygote. When a gamete receives a complete homologous chromosome pair as a result of nondisjunction, it combines with another gamete to form a trisomic zygote.
However, when nondisjunction occurs, the chromatids do not separate. The result is that one cell receives both chromatids, while the other cell receives neither. Each daughter cell then has an abnormal number of chromosomes when mitosis is complete; one cell has an extra chromosome, while the other is missing one.May 16, 2020
Which of the following might result in a human zygote with 45 chromosome? An error in either egg or sperm meiotic anaphase.
Nondisjunction Examples. Nondisjunction causes abnormal number chromosomes in all the cells called aneuploidy or in some cells called mosaicism. Some of the important examples are: Down's syndrome – Trisomy of autosomes, i.e. chromosome 21.
Nondisjunction in the first meiotic division. First division nondisjunction will only yield gametes with an extra chromosome, whereas second division nondisjunction will only yield gametes missing a chromosome.
Nondisjunction refers to the failure of pairs of chromosomes or sister chromatids to separate during meiosis or mitosis.