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An X-linked recessive gene results in color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the percentage chance that their son will be color-blind?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
In humans, the trait for not having a hitchhiker’s thumb (H) is dominant and having a hitchhiker’s thumb (h) is recessive. A family has 12 children. Eight of the children have no hitchhiker’s thumb. Four of the children have a hitchhiker’s thumb. Wha
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
A human zygote, like most other human cells, contains 46 chromosomes. How many chromosomes does a zygote receive from the mother?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
Hemophilia A, a blood disorder, is inherited in a similar way to red-green colorblindness. Therefore, hemophilia most often results when the affected gene is passed from
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
What is one role of transfer RNA in the cell?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
Mrs. Stefano has freckles (rr) but her husband, George, does not (RR). Which of these is the predicted ratio of children with no freckles to the children with freckles?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
Which of the following best describes the formation of a zygote?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
A scientist crossed a tall pea plant that produces smooth pea pods with a tall pea plant that produces wrinkled pea pods. All of the four hundred offspring produced were tall and produced smooth pea pods. Which response below explains these results?
The allele for smooth pea plants is dominant.
4:0
23
Mother to son
carrying amino acids to the ribosomes
50%
A sperm cell nucleus and an egg cell nucleus fuse.
Hh and Hh
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