Which of the following is not considered evidence that supports the endosymbiotic theory? mitochondria and chloroplast chromosomes are structurally similar to bacterial chromosomes. chloroplast dna and mitochondria dna is an exact copy of bacteria dna. mitochondria and chloroplast replicate/reproduce in a manner similar to prokaryotic cells. the ribosomes of mitochondria and chloroplast resemble those of bacteria.

The correct answer will be option-D

Explanation:

The endosymbiont theory suggests that bacteria form a symbiotic relationship with the cells and transformed into mitochondria and chloroplast of the cells.

The evidence which suggests that theory are closely related to the bacteria are:

1. These organelles have theory own DNA in the form of a circular chromosome like that of bacteria.

2. The chromosome contains the same sequence of genes and non-coding DNA.

3. the organelle divides by same binary fission method as used by the bacteria to divide.

4. The organelle contains their own ribosomes which help them produce their own proteins but studies suggest that mammalian ribosomes are knwon as 55S mitoribosome composed of small 28S and large 39S subunits.

Thus, option-D is the correct answer.

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.

cells spend most of their time in interphase