chromosomes

Question 1

what are chromosomes ?

Answer 1

Chromosomes are long, thin, thread-like structures that are found in the nuclei of the cells of living organisms.

Each chromosome is one very long DNA molecule wrapped around proteins.

Question 2

how many chromosomes do humans have ?

Answer 2

Humans have 46 Chromosomes in the cells of their body.

Question 3

how many remain chromosomes are there and what are they called ?

Answer 3

The other 44 chromosomes are not sex chromosomes and are known as autosomes.

Autosomes are grouped into 22 pairs, these pairs are homologous chromosomes (same)

Question 4

how are chromosomes arranged ?

Answer 4

They are arranged and numbered from longest to shortest.

Two of these chromosomes are the sex chromosomes
Female - XX
Male - XY

Question 5

what are homologous chromosomes ? and the structure of them ?

Answer 5

chromosomes with genes for particular characteristics at the same location. they are the same length and have the structure of centromere in the same position.

Question 6

what is a centromere ?

Answer 6

The centromere is the point of the chromosome where the two chromatids are joined together.

Question 7

what are chromatids ?

Answer 7

one of the stands of a chromosome following replication