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16. An organism whose genotype is Tt is considered a ________ while an organism with the genotype tt is a _________.
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
22. In a certain species of dog, a black nose is dominant over a pink nose. If my dog Gunner is homozygous for a pink nose and she mates with a purebred dominant male, what is the ratio of black to pink noses?
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
7. DNA is a double helix which means that it is shaped like a __________.
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
23. In parakeets, the ability to talk is a dominant trait. A heterozygous talker is mated with a non-talking parakeet. What is the ratio of talkers to non-talkers?
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
What does the nucleus of the cell contain and what does it do?
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
Altering the DNA of an organism in order to get the traits we want is called ____.
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
In our activity where you made a baby, who determined the sex of the offspring and why?
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
A hybrid organism can result when...
3:1
DNA; directs all cell activities.
The male because he carries both X and Y chromosomes
a spiral staircase
all black
b. two organisms of different species mate to make a new organism.
Genetic Engineering
hybrid, purebred
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