3. In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red (R) and white (W). The heterozygous genotype is expressed as pink.
a. What is the phenotype of a plant with the genotype RR? ____RED_______
b. What is the phenotype of a plant with the genotype WW? __WHITE_____
c. What is the phenotype of a plant with the genotype RW? ___PINK____
a. What is the phenotype of a plant with the genotype RR? ____RED_______
b. What is the phenotype of a plant with the genotype WW? __WHITE_____
c. What is the phenotype of a plant with the genotype RW? ___PINK____
"What is the difference between male and female chromosomes?"
Males have an X and a Y chromosomes and a female has two X chromosomes.
Males have an X and a Y chromosomes and a female has two X chromosomes.
"Why are there more men than woman with color-blindness, which is a recessive trait on the X chromosome?"
The gene for color-blindness is on the X chromosome and it is a recessive trait. Since men have only one X chromosome, if they have the color-blindness gene on the X chromosome, they are color-blind.
If a female gets the color-blindness gene, they still have another X chromosome that could be normal. They have to have two recessive X alleles for color-blindness.
The gene for color-blindness is on the X chromosome and it is a recessive trait. Since men have only one X chromosome, if they have the color-blindness gene on the X chromosome, they are color-blind.
If a female gets the color-blindness gene, they still have another X chromosome that could be normal. They have to have two recessive X alleles for color-blindness.
"Why can’t you have a male who is a carrier for color-blindness?"
If you look at the genotypes for the normal male and the color-blind male in previous problem, you can see that either a male is color-blind, or he is not. There is no carrier. For someone to be a carrier, they would have to have one normal gene and one recessive. Males only have one X chromosome, so this is not possible.
If you look at the genotypes for the normal male and the color-blind male in previous problem, you can see that either a male is color-blind, or he is not. There is no carrier. For someone to be a carrier, they would have to have one normal gene and one recessive. Males only have one X chromosome, so this is not possible.
· Manipulated (independent) variable - The part of the experiment changed by the experimenter
· Responding (dependent) variable - The outcome of the experiment. What is being measured. This changes because of the change in the manipulated variable.
· controlled variables - These stay the same for every test of the experiment.
· experimental control - The basis for comparison. This is one of the tests in which nothing is changed so that the rest of the trials can be compared to it.
· How to write a hypothesis - "If (how the manipulated variable changes), then (how the responding variable changes) because (a reasonable explanation).
· How to write a conclusion
1. Restate the hypothesis
2. Give the high and low points of data
3. How does the data prove your hypothesis was right or wrong
4. Any errors that could have changed the outcome of the experiment
· Responding (dependent) variable - The outcome of the experiment. What is being measured. This changes because of the change in the manipulated variable.
· controlled variables - These stay the same for every test of the experiment.
· experimental control - The basis for comparison. This is one of the tests in which nothing is changed so that the rest of the trials can be compared to it.
· How to write a hypothesis - "If (how the manipulated variable changes), then (how the responding variable changes) because (a reasonable explanation).
· How to write a conclusion
1. Restate the hypothesis
2. Give the high and low points of data
3. How does the data prove your hypothesis was right or wrong
4. Any errors that could have changed the outcome of the experiment
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