Question

Fill in the blank.
In humans, the ---- chromosome is responsible for maleness.

Answer 1

It is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. It is regularly the sex-determining chromosome in numerous species since it is the presence of nonappearance that commonly decides the male or female sex of offspring created in sexual reproduction.

Complete answer:
In humans, the Y chromosome is responsible for maleness. The Y chromosome comprised the gene SRY, which triggers male development in mammals. The DNA within the human Y chromosome consists of about 59 million base pairs. The Y chromosome is passed uniquely from father to boy child.

Additional Information: During an investigation of the mealworm Tenebrio Molitor, the Y chromosome was recognized as a sex-determining chromosome by Nettie Stevens at Bryn Mawr College in 1905. Edmund Beecher Wilson autonomously found comparable components an equal year. According to Stevens, he recommended that chromosomes consistently existed in pairs which the Y chromosome was the pair of the X chromosome found in 1890 by Hermann Henking. She understood that the past thought of Clarence Erwin McClung, that the X chromosome decides sex, wasn't right which sex determination is, indeed, because of the presence or non-appearance of the Y chromosome. Stevens named the chromosome "Y" essentially to follow on from Henking's "X" one after another in order.

The possibility that the Y chromosome was named after its likeness in appearance to the letter "Y" is mistaken. All chromosomes normally appear as an amorphous blob under the microscope and only combat a well-defined shape during mitosis. This shape is vaguely X-shaped for all chromosomes.
So the answer is ‘Y chromosome’.

Note: The vast majority of the sequence pairs are more prominent than 99.97% indistinguishable. The extensive use of gene conversion may play a role within the ability of the Y chromosome to edit genetic mistakes and maintain the integrity of the relatively few genes it carries. In other words, since the Y chromosome is single, it duplicates its genes on itself rather than having a second, homologous, chromosome. At the point when errors happen, it can utilize different pieces of itself as a format to correct them