Answer:
Trisomy 21 would show presence of an extra copy of chromosome 21 in a karyotype
Explanation:
Humans are diploid organisms, having 23 pairs of chromosomes (46 chromosomes in each cell. Trisomy represents a chromosomal disorder, with presence of an additional chromosome (total 47 chromosomes, instead of 46).
Down syndrome is a genetic disorder caused by trisomy of chromosome 21. Karyotype is used to represent appearance and number of chromosomes present in nucleus of a cell.
Thus, in karyotype trisomy 21 there would be an additional copy of chromosome 21. Diagram of karyotype trisomy 21 is attached with answer.
A karyotype is the number and appearance of chromosomes in the nucleus of an eukaryotic cell.
D should be correct sorry if wrong
Answer:
46 chromosomes
Explanation:
<em>I. G1 phase (Gap 1) - Cellular contents excluding the chromosomes, are duplicated. II. S phase (DNA Synthesis) - Each of the 46 chromosomes is duplicated by the cell.</em>
The classification can be revised based on DNA studying.
Option A.
Explanation:
The DNA or the Deoxyribonucleic acid is the complex molecule that's present in every cells of an organism and it is the molecule for storing the genetic information of an organism. The DNA contains the genes that are transferred from one organism to its offsprings by means of sexual reproduction.
In case of Red pandas, the detailed study about the genes present in them, along with the genes present in their near relatives and a tally between them gives us the information about the number of similar genes and their positions in chromosomes. So the study of DNA information gives the most chance to study the classification of the Red pandas.
