Question in English:
A female carries a recessive lethal gene (l) on one of her X chromosomes, and a normal dominant allele (L) on the other. What is the sex ratio to be expected in this woman's dependency if she marries a normal man?
Answer:
2/3 females
1/3 males
Explanation:
Females have two X chromosomes (XX) and males have an X and a Y chromosome (XY).
The genotype of the female is XLXl. The genotype of the male is XLY, since he is normal.
The possible genotypes are:
<u> XL Xl</u>
<u>XL</u> <em>XLXL XLXl</em>
<u>Y</u> <em>XLY </em><em>XlY</em>
<em />
All female offspring will be normal as they will always have one normal copy of the X chromosome from their father.
50% of the male offspring will be normal, but 50% will inherit the lethal gene from their mother.
Because the allele is lethal, that means XlY males will not be born.
That means 2/3 of the children will be females, and 1/3 will be males.
Two adaptations of a saguaro cactus in order to store water are as following:
1. large stems can store water.
2.thick waxy skin in order to reduce water loss through pores.
If you are implying one these choices not needed for survival it would be parents only when you can survive on your own (I'm not that sure but I hope this helped the slightest but)
Answer:
The answer to your question is below
Explanation:
1.- Prophase
2.- Metaphase
3.- A
4.- centrosomes
5.- Interphase
6.- D, A, C, F, E, B
7.- Animal cells, because plant cells have a cell wall that is a rigid structure that can be divided but gives support to the plant cell and in this picture, the cells do not this structure.
8.- Interphase
9.- Because cells can reproduce and newborn cells replace the old ones.
The Cell Membrane<span>. All living cells and many of the tiny organelles internal to cells are bounded by thin </span>membranes<span>. These </span>membranes<span> are </span>composed<span> primarily of phospholipids and proteins and are typically described as phospholipid bi-layers.
~Hope This Help</span>
