Secondary sexual characteristics are physical traits that emerge during puberty, marking the differentiation between males and females. These features are not directly linked to reproductive organs but are crucial for sexual distinction. 1. In Males: - Facial and Body Hair: Development of facial (beRead more
Secondary sexual characteristics are physical traits that emerge during puberty, marking the differentiation between males and females. These features are not directly linked to reproductive organs but are crucial for sexual distinction.
1. In Males:
– Facial and Body Hair: Development of facial (beard, mustache) and body hair (chest, arms).
– Voice Changes: Deepening of the voice due to the growth of the larynx (Adam’s apple).
– Muscle Development: Increase in muscle mass and broadening of shoulders.
– Genital Changes: Growth of the penis and testes.
2. In Females:
– Breast Development: Growth of breasts due to increased fat and glandular tissue.
– Body Shape: Wider hips and narrower waist.
– Pubic Hair: Growth of hair in the pubic area.
– Menstrual Cycle: Onset of menstruation, indicating reproductive readiness.
These characteristics arise from hormonal fluctuations, particularly androgens (e.g., testosterone in males) and estrogens (e.g., estradiol in females) released during puberty. While not directly involved in reproduction, they distinctly define gender and prepare the body for reproductive maturity.
Sex determination in an unborn baby occurs at conception. Humans possess 23 pairs of chromosomes in most cells, including one pair called sex chromosomes. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY). At fertilization, if a sperm carrying an X chromRead more
Sex determination in an unborn baby occurs at conception. Humans possess 23 pairs of chromosomes in most cells, including one pair called sex chromosomes. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
At fertilization, if a sperm carrying an X chromosome fertilizes the egg, the combination (XX) results in a female baby. However, if a sperm carrying a Y chromosome fertilizes the egg, the combination (XY) leads to the development of a male baby. The sex of the unborn baby is determined by the combination of chromosomes inherited from the parents during conception, dictating the baby’s development as male or female.
Write notes on: Secondary sexual characters.
Secondary sexual characteristics are physical traits that emerge during puberty, marking the differentiation between males and females. These features are not directly linked to reproductive organs but are crucial for sexual distinction. 1. In Males: - Facial and Body Hair: Development of facial (beRead more
Secondary sexual characteristics are physical traits that emerge during puberty, marking the differentiation between males and females. These features are not directly linked to reproductive organs but are crucial for sexual distinction.
1. In Males:
– Facial and Body Hair: Development of facial (beard, mustache) and body hair (chest, arms).
– Voice Changes: Deepening of the voice due to the growth of the larynx (Adam’s apple).
– Muscle Development: Increase in muscle mass and broadening of shoulders.
– Genital Changes: Growth of the penis and testes.
2. In Females:
– Breast Development: Growth of breasts due to increased fat and glandular tissue.
– Body Shape: Wider hips and narrower waist.
– Pubic Hair: Growth of hair in the pubic area.
– Menstrual Cycle: Onset of menstruation, indicating reproductive readiness.
These characteristics arise from hormonal fluctuations, particularly androgens (e.g., testosterone in males) and estrogens (e.g., estradiol in females) released during puberty. While not directly involved in reproduction, they distinctly define gender and prepare the body for reproductive maturity.
See lessWrite notes on: Sex determination in the unborn baby.
Sex determination in an unborn baby occurs at conception. Humans possess 23 pairs of chromosomes in most cells, including one pair called sex chromosomes. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY). At fertilization, if a sperm carrying an X chromRead more
Sex determination in an unborn baby occurs at conception. Humans possess 23 pairs of chromosomes in most cells, including one pair called sex chromosomes. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
At fertilization, if a sperm carrying an X chromosome fertilizes the egg, the combination (XX) results in a female baby. However, if a sperm carrying a Y chromosome fertilizes the egg, the combination (XY) leads to the development of a male baby. The sex of the unborn baby is determined by the combination of chromosomes inherited from the parents during conception, dictating the baby’s development as male or female.
See less