. Common red clover, Trifolium pratense, is a diploidwith 14 chromosomes per somatic cell. What wouldbe the somatic chromosome number of:a. a trisomic variant of this species?
. Common red clover, Trifolium pratense, is a diploid
with 14 chromosomes per somatic cell. What would
be the somatic chromosome number of:
a. a trisomic variant of this species?
Somatic cells also are known as vegetal cells have two sets of chromosomes and are thus considered as diploid. The somatic cells of some organisms may even have four (tetraploid) or even six (hexaploidy) or more than six sets of chromosomes. They are different from those of reproductive cells such as gametes, germ cells, and also from stem cells which are undifferentiated.
Aneuploidy is a condition of having fewer or extra chromosomes that the normal genome number of species. It arises due to non-disjunction of the two chromosomes of homologous pairs.
Trisomy is a type of aneuploidy in which the diploid cells have one extra copy of a chromosome instead of two. Hence, it can be represented as (2n + 1) Where ‘n’ represents a set of chromosomes.
The chromosome number of a diploid cell of Trifolium pratense is 14. A diploid cell contains two sets of chromosomes. Thus, it suggests that in one set of chromosomes of Trifolium pratense there are 7 chromosomes.
The somatic cells of a trisomic variant of Trifolium pratense will have 2n + 1 number of chromosomes. Where 'n' represents the number of chromosomes in a set.
Thus, the number of chromosomes in a trisomic variant is,
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