Watch a Video:
Watch the video below and answer the following questions:
1. What is incomplete dominance?
2. Pause at 0:56 and do the problem: The genes for flower color in Japanese four o’clocks show incomplete dominance. Give the genotypic and phenotypic ratios of flower colors for pink x pink and red x white.
3. What is codominance?
4. Pause at 2:30 and do the problem: A homozygous red horse is mated with a roan horse (codominant red and white hairs), what is the possibility of producing another roan horse?
5. Pause at 3:10 and do the problem: What is the chance of a female with blood type A and a male with type B blood to have a child with blood type O, assuming those with type A and B are heterozygous?
6. What are sex-linked traits? Genes that are located on the X chromosome.
7. Pause at 4:04 and do the problem: A normal male (XHY) and a female (XHXh) who is a carry of hemophilia marry. What is the probability of a child produced by these two individuals being born with the disease?
8. Pause at 4:45 and do the problem: A man that is red-green colorblind (XnY) has a child with a woman (XNXN) that does not carry the colorblind gene. What is the probability that a child born from this union is colorblind?
9. Pause at 5:08 and do the problem: Eye color is a sex-link trait in Drosophila. Red eyes are dominant over white eyes Use a Punnett square to determine the possible genotypes and phenotypes of a cross between a white-eyed female and a red-eyed male.