What is location dependent sex determination?
Location-dependent sex determination in Bonellia and Crepidula. As mentioned in Chapter 3, the sex of the echiuroid worm Bonellia depends on where a larva settles. If a Bonellia larva lands on the ocean floor, it develops into a 10-cm-long female.
What is the sex determination for female?
XX
A child’s biological sex (male or female) is determined by the chromosome that the male parent contributes. Males have XY sex chromosomes while females have XX sex chromosomes; the male can contribute the X or Y chromosome, while the female must contribute one of their X chromosomes.
What are the factors that affect sex determination?
Environmental factors which often influence sex determination during development or sexual maturation include light intensity and photoperiod, temperature, nutrient availability, and pheromones emitted by surrounding plants or animals.
How does sex determination takes place in humans give an example?
male have XY chromosomes and female have XX chromosomes. it is dependent on the male whether it contributes X or Y chromosome . if he contribute X them the pair wil be XX and a baby girl will be born, but if Y is given by male the pair formed is XY and a baby boy will be born.. it is only XY / XX game.
What is TSD and ESD?
TSD differs from the chromosomal sex-determination systems common among vertebrates. It is the most studied type of environmental sex determination (ESD).
What causes temperature-dependent sex determination?
One cause of TSD is the enzyme aromatase. Aromatase helps to convert sex steroids, a group of hormones that influence sex development and reproduction, from male sex hormones (androgens) to female sex hormones (estrogens).
Which of the sex determination is both male and female?
In which of the sex determination both male and female same number of chromosomes? Name the sex chromosomes in males and females….
| Question | |
|---|---|
| Subject | Biology (more Questions) |
| Class | 12th |
| Type of Answer | Video & Image |
| Question Language | In Video – English In Text – English |
What is the SRY gene where is it found and what does it do?
The SRY gene is found on the Y chromosome. The sex-determining region Y protein produced from this gene acts as a transcription factor, which means it attaches (binds) to specific regions of DNA and helps control the activity of particular genes.
What are the three 3 types of sex determination?
XX/XY sex chromosomes
- Y-centered sex determination.
- X-centered sex determination.
- Other variants of XX/XY sex determination.
In which of the following is sex determined by environment?
So, from the options given, it is Bonellia in which sex is determined by external environmental factors.
How is male or female determined in humans?
Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father. Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born.
Does body temperature determine gender?
Unlikely in humans? All known species with temperature-dependent sex determination are both oviparous, or egg-layers, and cold-blooded, meaning their body temperatures change with that of their surroundings. However, humans are neither of those things.
Where is sex not determined genetically?
In snails, individuals can change sex, indicating that sex is not genetically determined in them.
What does a Barr body represent?
One of two X-chromosomes in somatic cells of female.
Where is SRY gene located?
the Y chromosome
The SRY gene is found on the Y chromosome. The sex-determining region Y protein produced from this gene acts as a transcription factor, which means it attaches (binds) to specific regions of DNA and helps control the activity of particular genes.
Where is the SRY gene located 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.
Why are females always cold?
Metabolism and heat Blame our slower metabolisms. A study in the Journal of Applied Physiology showed that the resting metabolic rate, or the amount of energy your body burns at rest, was 23% higher in men than women. A slower metabolism causes women to produce less heat so they tend to feel colder.
In which of the following a * * * * * * * * * is not genetically determined?
Solution : In snail, sex is not genetically determined.