Crossing over locus diplotene genotype chiasma / chiasmata phenotype Diakinesis true breeding lines polar bodies monohybrid cross Classical genetics Punnett square molecular genetics test cross DNA cloning tester How would the results of the cross in Figure If you cross a homozygous, dog with a smooth-haired dog, 3 have been different if heredity worked what will be the genotype and through blending inheritance rather than phenotype of the F1 generation? particulate inheritance? If two dogs from the F1 generation Imagine that astronauts provide you with mated, what would be the most likely living samples of multicellular organisms ratio of hair phenotypes among their discovered on another planet. These progeny? organisms reproduce with a short When two wirey-haired Ww dogs generation time, but nothing else is known actually mated, they had alitter of three about their genetics. puppies, which all had smooth hair. How could you define laws of heredity How do you explain this observation? for these organisms? Someone left a dog on your How you determine what doorstep. Without extracting DNA, molecules within these organisms what would be the easiest way to contained genetic information? determine the genotype of this dog? Would the mechanisms of genetic Based on the information provided in inheritance likely be similar for all question 1, can you tell which, if either, organisms from this planet? of the alleles is wild-type? the mechanisms of genetic inheritance likely be similar to An important part of Mendel’s experiments organisms from earth? was the use of homozygous lines as parents for his crosses. How did he know A simple mnemonic for leptotene, zygotene, they were homozygous, and why was the pachytene, diplotene, & diakinesis is Lame use of the lines important? Make another Zebras Pee Down Drains. Does segregation of alleles into one yourself. daughter cells happen during mitosis, What is the maximum number of alleles for meiosis, or both? a given locus in a normal gamete of a If your blood type is B, what are the diploid species? possible genotypes of your parents at the Wirey hair (W) is dominant to smooth hair locus that controls the ABO blood types? (w) in dogs. –
Crossing over diplotene chiasma / chiasmata Diakinesis polar bodies Classical genetics molecular genetics DNA cloning locus genotype phenotype true breeding lines monohybrid cross Punnett square test cross tester How would the results of the cross in Figure 3 have been different if heredity worked through blending inheritance rather than particulate inheritance? Imagine that astronauts provide you with living samples of multicellular organisms discovered on another planet. These organisms reproduce with a short generation time, but nothing else is known about their genetics. How could you define laws of heredity for these organisms? How you determine what molecules within these organisms contained genetic information? Would the mechanisms of genetic inheritance likely be similar for all organisms from this planet? the mechanisms of genetic inheritance likely be similar to organisms from earth? A simple mnemonic for leptotene, zygotene, pachytene, diplotene, & diakinesis is Lame Zebras Pee Down Drains. Make another one yourself. What is the maximum number of alleles for a given locus in a normal gamete of a diploid species? Wirey hair (W) is dominant to smooth hair (w) in dogs. If you cross a homozygous, dog with a smooth-haired dog, what will be the genotype and phenotype of the F1 generation? If two dogs from the F1 generation mated, what would be the most likely ratio of hair phenotypes among their progeny? When two wirey-haired Ww dogs actually mated, they had alitter of three puppies, which all had smooth hair. How do you explain this observation? Someone left a dog on your doorstep. Without extracting DNA, what would be the easiest way to determine the genotype of this dog? Based on the information provided in question 1, can you tell which, if either, of the alleles is wild-type? An important part of Mendel’s experiments was the use of homozygous lines as parents for his crosses. How did he know they were homozygous, and why was the use of the lines important? Does segregation of alleles into daughter cells happen during mitosis, meiosis, or both? If your blood type is B, what are the possible genotypes of your parents at the locus that controls the ABO blood types? –