1)The locus that controls ABO blood type in humans resides on chromosome 9. Three alleles, IA, IB,..

1)The locus that controls ABO blood type in humans resides on chromosome 9. Three alleles, IA, IB,..

1)The locus that controls ABO blood type in humans resides on chromosome 9. Three alleles, IA, IB, and i determine the blood type A, B, and O, respectively. The inheritance pattern of ABO blood type is illustrated in this table. Blood type Genotype A IAi; IAIA AO; AA B IBi; IBIB BO; BB AB IAIB AB O ii OO The Rh blood type is a genetic trait distinct from ABO blood type. Rh blood type is controlled by one locus on chromosome 1. The D allele determines Rh+ blood type, and the d allele determines Rh- blood type. The inheritance pattern of Rh blood type is illustrated in this table. Blood type Genotype Rh+ DD; Dd Rh- dd The father is blood type O, Rh- (abbreviated as O-), and mother is blood type O+. They have a son of blood type O-. What is the probability that their next child is blood type B+? 0% 25% 50% 12.5%
2)The locus that controls ABO blood type in humans resides on chromosome 9. Three alleles, IA, IB, and i determine the blood type A, B, and O, respectively. The inheritance pattern of ABO blood type is illustrated in this table. Blood type Genotype A IAi; IAIA AO; AA B IBi; IBIB BO; BB AB IAIB AB O ii OO A father has type A blood, while a mother has type AB blood. Which of the following is true about the blood type of their child? The probability that their child has type A blood is 50%. The probability that their child has type B blood is 50%. The probability that their child has type A blood is 25%. The probability that their child has type B blood is 6.25%.
3)A group of students was studying dandelion cells. The students observed that some of the cells were undergoing meiosis to produce seeds and some were undergoing mitosis to produce flowers and leaves. When examining the cells, which of the following would the students observe in both the cells undergoing meiosis and the cells undergoing mitosis? I. One round of DNA duplication occurs before cell division starts. II. The resulting cells are genetically identical to each other. III. Sister chromosomes form a synapsis where chiasmas form and cross-overs occur. IV. Sister chromatids cling together due to chromosome cohesion until enzymes cleave the bonds. I & II I & IV II & III III & IV
4)Dogs have a wide range of coat colors, even within a given breed of dog. Scientists studying animal genetics ran studies by mating two dogs with a solid brown coat. The resulting offspring had light brown, dark brown, black, and spotted coats. After studying several mating cycles, scientists concluded that while brown coats are more common, there does not appear to be a fixed ratio of phenotypes. What is the most likely explanation for the inheritance pattern of dog coat color? Dog coat color is a polygenic trait. Dog coat color is controlled by a pleiotropic gene. Dog coat color is controlled by epistasis inheritance. Dog coat color follows an incomplete dominance pattern of inheritance.   5)It is believed that mitchondrial DNA (mtDNA) follows a non-Mendelian inheritance pattern. It is hypothesized that all mitochondria are inherited from the egg, and the sperm cell does not contribute mitochondria to the fertilized egg. Which of the following experimental procedures would be the best method to test this theory? Test the mtDNA of random flies to determine if all flies have the same mtDNA Mate a specific fly, and test the mtDNA of both a male and female offspring to see if the mtDNA is identical to the mother. Mate a specific female fly, and select a male and female offspring. Mate them with each other and test the mtDNA of the “grandchildren.” Mate a female fly, and mate the offspring with unrelated flies with different mtDNA. Test the mtDNA of the “grandchildren.”   6)Not all traits are determined solely by genes. Many traits have been found to exhibit phenotypic plasticity, which occurs when individuals with the same genotype exhibit different phenotypes in different environments. Which of the following is an example of phenotypic plasticity? Well-maintained hedges can be shaped into artistic displays. A person who experienced malnutrition as a child is short in stature as an adult. Bears living in the arctic developed white fur and cold tolerance over many generations. Certain breeds of dog have been bred for specific traits, such as poodles being bred for intelligence.   Apr 06 2022 12:55 PM

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