Question

Which type of gene regulates sex determination in spinach plant?
A. Multiple genes
B. Heterozygous genes
C. Siècle gene
D. Homozygous gene

Answer 1

Sex determination is a process of sex differentiation that utilizes various genital concepts to decide upon whether a particular individual will develop into male or female. There are various factors that influence sex determination. In spinach, sex chromosomes are not alike.

Complete answer: The chromosome which differs in morphology and number in male and female contains genes responsible for the determination of sex are known as sex chromosomes. The sex chromosomes in spinach are heterozygous genes. Heterozygous genes are referred to be variant forms of the same type of a gene. For example, in humans, sex chromosomes have two different forms i.e. X and Y. Though both of these are sex chromosomes, they vary in form. Similarly, there are heterozygous genes that regulate sex determination in spinach. Genetically, spinach is diploid with 2n=12 sex chromosomes. The gender of the species is influenced by the XY sex chromosome, which is heterozygous. Spinach is an annual leafy vegetable that is rich in minerals like iron and vitamins. Spinach is commonly known for its abundance of iron and vitamin A.
Hence, the correct answer is option B.

Note: Spinach is widely known to be dioecious which means it has both the sexes present in its flowers. It is known for having an even ratio of female to male individuals. In some plants, sex determination is dependent upon the environmental conditions, however, in many other species like spinach, sex determination is based on sex chromosomes.