Answer:
True
Explanation:
Testosterone is the primary male sex hormone. It is produced by the Leydig cells of the testis. The testosterone produced by both males and females. The amount is more male than females. In females, testosterone is in the form of androgen hormone.
The anterior pituitary secretes 2 hormones i.e. LH and FSH. The luteinizing hormone from the pituitary gland enters into the interstitial space of the testis. In the interstitial space, Leydig cells are present, which are the target organ for LH. The LH stimulates the Leydig cells to produce testosterone. Hence Leydig cells are also called interstitial cells.
Testosterone secretes from the Leydig cells of the testis and mixes with the bloodstream. It produces in the presence of LH. Then it reaches to different cells of the body by the bloodstream. Testosterone maintains bone and muscle growth, induces the secondary sexual characters.
When testosterone level is high in the blood, it sends a signal to the brain to decrease the secretion of testosterone. This is the negative feedback mechanism of testosterone.
One of there ansestors must have had blue eyes, or might have been a genetic mutation. But it's rare to find such a random mutation. But we must keep in mind that reproduction of cells and when DNA is copied it could have a mutation. But the likely explanation would be that one of there ansestors or grand parents had blue eyes until the trait that forms brown eyes became more common in the family tree.
D! Because a gas takes its form and volume of its container
<span>advancing mass of warm air, in particular, the leading edge of the warm sector of a low-pressure system.</span>
The answer is <span>C) Bb x Bb
</span>
B - the allele for black and white coloration
b - the allele for brown and white coloration
There are in total 11 offspring (<span>8 black and white and 3 brown and white),
In a monohybrid cross when both parents are heterozygous (Bb), the phenotype ratio is 3:1. We have ratio 8:3.
The ideal ratio would be 9:3 because it is the same as 3:1.
Therefore, the parents Bb and Bb will have </span>8 black and white and 3 brown and white with the ration 8:3 ≈ 9:3 = 3:1