BIOL355 Genetics HW Assignment 1 PDF - Genetics Practice Problems

BIOL355 Genetics Sp25​ ​ HW Assignment 1​ ​ ​ Due 2/10 @ 1pm For these questions, feel free to work in groups but submit a sheet for yourself. You must show ALL work for full credit! Remember, these are practice problems to aid you in the understanding of the processes i...

BIOL355 Genetics Sp25​ ​ HW Assignment 1​ ​ ​ Due 2/10 @ 1pm For these questions, feel free to work in groups but submit a sheet for yourself. You must show ALL work for full credit! Remember, these are practice problems to aid you in the understanding of the processes involved. Simply knowing the answer may not be very indicative of your understanding of the course. Also, keep in mind you may be timed during our assessments! 1)​ Three genes (A, B, and C) are found on three different chromosomes. For the following diploid genotypes, describe all of the possible gamete combinations they could produce: a)​ AaBbCc b)​ AABbCC c)​ AaBBCc d)​ aaBbCc e)​ Aabbcc 2)​ If, from question 1 above, if organism c and d had an offspring, how many different phenotypes could possibly result (not the ratios, but the possible combinations)? Work this out to account for all the combinations. You may use abbreviations: when the phenotype will represent the dominant trait, you may use “D” and then use “r” for the recessive trait. Ex DDD, DDr, DrD, etc. 3)​ Wiry hair (W) is dominant to smooth hair (w) in dogs. a)​ If you cross a homozygous, wiry-haired dog with a smooth-haired dog, what will be the genotype and phenotype of the F1 generation? b)​ If two dogs from the F1 generation, above, are mated, what would be the most likely ratio of hair phenotypes among their progeny? c)​ Someone left a wiry-haired dog on your doorstep. Without extracting DNA, what would be the easiest way to determine the genotype of this dog? Please demonstrate this process. BIOL355 Genetics Sp25​ ​ HW Assignment 1​ ​ ​ Due 2/10 @ 1pm 4)​ A cross is made between a pea plant that has constricted pods (a recessive trait; smooth is dominant) and is heterozygous for seed color (yellow is dominant to green) and a plant that is heterozygous for both pod texture and seed color. Construct a Punnett square that depicts this cross. What are the predicted outcomes of genotypes and phenotypes of the offspring? 5)​ 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 these lines important? 6)​ What is the difference between genotype and phenotype? Is it possible to have two organisms with the same phenotype but a different genotype? If so, how?