Question

question 1
which of the above can be observed in a somatic cell?
a and d
a only
b only
c only
d only
a and c

Explanation:

Somatic cells are diploid cells. In diploid cells, homologous chromosomes are present. Homologous chromosomes have the same genes at the same loci but can have different alleles. Option a shows homologous chromosomes (two pairs, each pair having the same gene loci - for example, for the top gene, one has \(A\) and the other has \(a\) in a diploid - like situation if we consider a diploid with two sets of chromosomes). Options b, c, and d do not represent the normal diploid - homologous chromosome situation in somatic cells. For example, option b has a single chromosome (not homologous pair in the correct diploid sense for somatic cells), option c has two non - homologous looking chromosomes (in a somatic cell, we expect pairs of homologous chromosomes), and option d has two non - homologous chromosomes (in a diploid somatic cell, chromosomes exist in pairs).

Answer:

A only