Which process occurs when chromosomes do not separate during meiosis? evolution nondisjunction transformation replication

The correct answer is B. Nondisjunction

Explanation:

The nondisjunction is a type of failure that can occur in different stages of cell divisions if chromosomes or sister chromatids do not separate or disjoin as it is expected. This applies to meiosis (type I and II) and also mitosis which leads to cells that have an abnormal number of chromosomes either because they lack a chromosome or they have an extra chromosome. Additionally, nondisjunction often causes genetic disorders such as Down syndrome or Klinefelter syndrome. Thus, the process that occurs when chromosomes do not separate during meiosis is Nondisjunction.

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.

the answer would be..

b. sucking