Flag 8 grade science> Write notes on : [NCERT] Adam’s apple Sec...
question mark

Write notes on : [NCERT] Adam’s apple Secondary sexual characters Sex determination in the unborn baby.

Harshit Singh , 3 Years ago
Grade 12th pass
anser 1 Answers
Pawan Prajapati

Last Activity: 3 Years ago

1)In boys the voice changes due to better growth of larynx, which protrudes on the throat forming Adam’s apple. Thus, the voice becomes deep and hoarse. 2) Secondary sex characters develop- In both, boys and girls, hair starts growing in arm pits and the pubic region. In boys moustache and beard appear. In girls, oestrogen makes the breasts develop with milk secreting glands inside. 3) The sex of the baby is determined by the XX and XY chromosomes in a zygote. X chromosome stands for female and Y chromosome for male character. When X and X chromosomes form zygote (XX) the baby is female. When X and Y chromosomes form zygote (XY) the baby is male.

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...