In order to be passed to offspring, what type of cell must a mutation be in?

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?

A human zygote, like most other human cells, contains 46 chromosomes. How many chromosomes does a zygote receive from the mother?

Which of the following best describes the formation of a zygote?

Two spotted leopards produce a litter of four cubs. Three of the cubs are spotted and one is solid black. The black coat is probably what type of trait?

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?

Which of these best explains the pattern of inheritance for the red-green colorblindness trait?

In a pedigree, how will you know if someone is affected by the trait studied?

A man with colorblindness married a woman who is not a carrier of red-green colorblindness. If they have a female child, what is the chance that she will be born with red-green colorblindness?

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

Which of these combinations results in the expression of a recessive trait?

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

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?

In pigeons, the allele B produces ash-red feathers. The allele b produces blue feathers. The B allele is dominant to the b allele. A pigeon with genotype Bb is crossed with a pigeon with genotype bb. What percent of the offspring are expected to have

In tobacco, if the diploid number of chromosomes is 48, how many chromosomes will be found in a pollen grain, or gamete?

What is one role of transfer RNA in the cell?

Which two structures of a frog would most likely have the same chromosome number?

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?

A healthy individual is a carrier of a lethal allele but is unaffected by it. What is the probable genotype of this individual?

Why is the particular sequence of bases in a segment of DNA important to cells?

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