7. In Labrador retrievers, coat color is controlled by genes at two loci that demonstrate epistasis, The first locus has two alleles, one for black pigment and one for brown (chocolate) pigment.
The black allele is dominant. The alleles at the second locus determine if the pigment is
deposited in the fur of the animal. If the dog has two recessive alleles at this locus, no pigment
will be deposited in the fur and the dog will be a yefow lab. If the dog has at least one dominant
allele at this locus and at least one black pigment allele, they will be a black lab. If the dog has
two brown alleles and at least one dominant allele at the second locus, they will be a chocolate
lab.
a. If a dog breeder crosses a yellow lab that is heterozygous for coat color with a black lab that
is heterozygous at both loci, what do you expect the phenotypic ratio of the offspring to be?
Use the box below to write out the Punnett square for this cross:

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.