ANIMAL REPRODUCTION AND DEVELOPMENT
ASEXUAL REPRODUCTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
When the zygote will have an abnormal number of all chromosomes
|
|
|
When the zygote will have an abnormal number of one chromosome
|
|
|
What occurs when chromosomes do not fully separate during meiosis
|
|
|
What occurs when chromosomes do not fully separate during mitosis
|
Detailed explanation-1: -These gametes form your body’s sex cells, which are sperm in males and eggs in females. Aneuploidy occurs during meiosis when pairs of chromosomes don’t complete the process of cell division and fail to separate. Aneuploidy is random and unpredictable.
Detailed explanation-2: -(AN-yoo-PLOY-dee) The occurrence of one or more extra or missing chromosomes leading to an unbalanced chromosome complement, or any chromosome number that is not an exact multiple of the haploid number (which is 23).
Detailed explanation-3: -If homologous chromosomes fail to separate during meiosis I, the result is two gametes that lack that particular chromosome and two gametes with two copies of the chromosome.
Detailed explanation-4: -Aneuploidy originates during cell division when the chromosomes do not separate properly between the two cells (nondisjunction). Most cases of aneuploidy in the autosomes result in miscarriage, and the most common extra autosomal chromosomes among live births are 21, 18 and 13.