Expression of each gene requires a unique combination of
multiple transcription factors. Expressing a gene all the time, regardless of conditions,
Pax-6 is highly conserved and shows shared evolutionary ancestry. cytoplasmic
determinants that are distributed unevenly in the unfertilized egg inductive signals from one cell to another. Gradients of molecules in developing tissues. <span>the products of regulatory genes.</span>
If they are both heterozygous, then they both have alleles Bb.
Using a Punnett square, we draw the following:
B b
B BB Bb
b bB bb
Since B is dominant, so only bb will give white fur, i.e. 1 out of four is expected to give white fur.
Probability is therefore 1/4.
Answer:
D. 0.60
Explanation:
If the population is in Hardy-Weinberg equilibrium, the genotypic frequencies are:
- freq AA = p²
- freq Aa = 2pq
- freq aa = q²
<em>p</em> is the frequency of the Rh positive allele (A) and <em>q</em> is the frequency of the Rh-negative allele (a).
If 84% of the population is Rh-positive, then 16% is Rh-negative and has the genotype <em>aa</em>. Therefore:
q² = 0.16
q = √0.16
q=0.4
And because p+q=1,
p = 1 - 0.4
p = 0.6
The frequency of the Rh-positive allele is 0.6
Answer and Explanation:
Cells are made of DNA (Deoxyribonucleic Acid).
They provide the genetic instructions for making and forming a cell.
The DNA is found inside the nucleus of the cell.
Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. This packaged form of the DNA is called a chromosome
DNA do NOT have cells, but cells DO have DNA.
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