- 1 What is comparing gamete production in males and females?
- 2 What gene on the Y chromosome initiates male phenotypic development?
- 3 What are the secretory structures that produce milk?
- 4 Which is not considered to be a change associated with aging in males?
- 5 What is the unique difference between female egg production and male sperm production in mammals?
- 6 Is gamete male or female?
- 7 What is the purpose of SRY on the Y chromosome?
- 8 What happens if SRY gene is deleted?
- 9 What happens if an XY individual is missing the SRY gene?
- 10 Which hormone helps in milk production?
- 11 What is milk biologically?
- 12 Which cells are responsible for milk production?
- 13 How does a man’s body change after 50?
- 14 Do testes shrink as you get older?
- 15 What happens to a man body at 60?
What is comparing gamete production in males and females?
The main difference between male and female gametes is that male gametes are called sperm cells and are produced by the male reproductive organs whereas female gametes are called egg cells and are produced by the female reproductive organs. Both male and female gametes are produced by meiosis of the germ cells.
What gene on the Y chromosome initiates male phenotypic development?
The Sex-determining Region Y (Sry in mammals but SRY in humans) is a gene found on Y chromosomes that leads to the development of male phenotypes, such as testes. The Sry gene, located on the short branch of the Y chromosome, initiates male embryonic development in the XY sex determination system.
What are the secretory structures that produce milk?
The secretory structures that produce milk in a lactating female are the: alveoli.
Which is not considered to be a change associated with aging in males?
Which is not considered to be a change associated with aging in males? development. During development, the __________ ducts form the female duct system. clitoris.
What is the unique difference between female egg production and male sperm production in mammals?
Oogenesis produces polar bodies, cells that are discarded during meiotic divisions; during spermatogenesis, by contrast, no such polar bodies are formed. Consequently, a single primary oocyte gives rise to only one egg and three polar bodies whereas a single primary spermatocyte can give rise to four sperm.
Is gamete male or female?
Gametes are an organism’s reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm.
What is the purpose of SRY on the Y chromosome?
The gene SRY (sex determining region of the Y), located at the distal region of the short arm of the Y chromosome, is necessary for male sex determination in mammals. SRY initiates the cascade of steps necessary to form a testis from an undifferentiated gonad.
What happens if SRY gene is deleted?
Some gene mutations block the action of SRY in development. Thus, a 46,XY individual with an SRY deletion or mutation will develop as a female, and a 46,XX individual with translocation of SRY to 1 X chromosome will develop as a male.
What happens if an XY individual is missing the SRY gene?
When this happens, the male parts don’t get made. But neither do the ovaries or uterus, in most cases. The end result is an XY person who looks female but almost always cannot get pregnant. When the SRY gene isn’t working, the resulting condition is called Swyer syndrome, or XY gonadal dysgenesis.
Which hormone helps in milk production?
At delivery, levels of estrogen and progesterone fall, allowing the hormone prolactin to increase and initiate milk production.
What is milk biologically?
(Science: physiology) A white fluid secreted by the mammary glands of female mammals for the nourishment of their young, consisting of minute globules of fat suspended in a solution of casein, albumin, milk sugar, and inorganic salts. White as morne milk.
Which cells are responsible for milk production?
Anatomy and Physiology of Lactation. Breast milk is produced by the mammary alveolar cells of the breast after childbirth. The mammary gland is a highly evolved skin gland, and its rudiments are first seen during the 6th week in utero.
How does a man’s body change after 50?
50-year-old men experience many physical changes as a result of aging. Hormone levels, bone density, muscle mass, eyesight, hair color, skin cells, cognition, and immunity all go through noticeable changes after age 50. Many age-related symptoms can be addressed with research-backed treatments.
Do testes shrink as you get older?
As you age, testosterone production tends to drop as your testicles start to get smaller. This is known as testicular atrophy. The change is often gradual and may not be especially noticeable. When it occurs naturally, there is no health threat.
What happens to a man body at 60?
Your skin turns drier and itchier and may look like crepe paper or tissue. Wrinkles, age spots, creases, and bruises become more noticeable. Your sweat glands also get less active. That means you might not sweat as much, but wounds on your skin may take longer to heal.