Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Who used the term X-body and what determines the sex in human being?

Name any two vertebrate body parts that are homologous to human forelimbs.

Name the hormone that maintains the functions of male accessory ducts and glands.

Name any genetically modified crop.

After a successful in vitro fertilisation, the fertilised egg begins to divide. Where is TSV To this egg transferred before it reaches the 8-cell stage and what is the technique named?

If the sequence of one strand of DNA is written as follows:
5'-ATGCATGCATGCATGCATGCATGCATGC-3'
Write down the sequence of complementary sequence in 5'→3' direction.

AaBb was crossed with aabb. What would be the phenotypic ratio of the progeny? Mention the term to denote this kind of cross.

The hollow foliar structure that encloses the leaf primordia in a grass embryo, is called ______.

Mention two causes of frame–shift mutation.

The basal parts of the endometrium remain intact during menstruation. Give reason.