Genetics Review. Honors Bio 2011. Which parents would you expect to give only one phenotype?. AaBb x aabb AaBb x AABB AaBb x AaBb AaBb x AAbb. Which parents would you expect to give a 9:3:3:1 ratio of phenotypes?. AaBb x aabb AaBb x AABB AaBb x AaBb AaBb x AAbb.
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Honors Bio 2011
In garden peas, yellow seed color is dominant over green. A cross between a homozygous yellow plant and a homozygous green plant yields 25 plants. If an F1 cross were performed and 40 plants were produced, how many of the F2 plants would you expect to be yellow?
Regions marked A and B are genes. “A” results in the production of purple flowers. “B” results in the production of white flowers. Which term best describes these different flower color genes?
Cattle have red, roan, & white coat colors. When a red bull and white cow mate, a roan color, which is a “mixture” of red & white, is produced. What is this an example of?
A cross is made between two parents with the genotypes AaBB and aabb. If there are 32 offspring, how many of them would be expected to be heterozygous for both characteristics?
Below is a pedigree showing red-green color-blindness, a recessive sex-linked trait in a family. What is the genotype of the individual indicated by the arrow?
In toucans, yellow beak color (Y) is dominant over green beak color and long feathers (L) are dominant over short. A male toucan with a green beak and long feathers mates with a female with a yellow beak and long feathers. They have offspring with green beaks and short feathers. What are the genotypes of the parents?
If the person that is the arrow is pointing to marries a female who is homozygous dominant, what is the possibility that they will have a daughter that carries the red-green colorblindness gene?
A man with a blood type A marries a woman with blood type B. Their first child has type O blood. What is the possibility that they could have another child with blood type O?
In roses, red color is dominant over yellow color. A cross between a homozygous red rose and a homozygous yellow rose yields 80 heterozygous roses. A cross between two of these heterozygous roses yields 160 F2 roses. How many of these F2 roses are expected to be red?
In spiders eight legs is due to a dominant allele (E). Hairy bodies on spiders are due to another dominant allele (H). If a male who has both conditions (EeHh) mates with a female with both (EeHh), what are the chances of an offspring having only one of the two dominant traits?