A chromosomes has the following segments, where  represents the centromere: M N O  P Q R S T Give the chromosome sequences that would result from the following mutations: a. Deletion of MN b. Pericentric inversion of NOP c. Inversion of RS, followed by tandem duplication of QRST

a. O | | PQRST

b. MP | | ONQRST

c. MNO | | PQSRTQRST

Explanation:

Deletion of MN: this refers to the removal of the MN segment from the seuence. thus we will have:

MNO | | PQRST - O | | PQRST

Pericentric inversion of NOP: this is a type of chromosomal rearrangement in which the order of sequence of changed through a 180 degrees orientation and this involves the centromere. thus, we will have

MNO | | PQRST - MP | | ONQRST

Inversion of RS: this does not include the centromere and is called a paracentric inversion.

MNO | | PQRST - MNO | | PQSRT

then followed by tandem duplication of QRST. Thus we will have:

MNO | | PQSRTQRST

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.