BISC207 Lecture Notes - Lecture 12: Mendelian Inheritance, Pleiotropy, Y Chromosome
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BISC207 Full Course Notes
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What are the chances of having a boy and then two girls- 1/8. What are the chances of having a boy and two girls- 3/8. Principles of segregation: pairs of alleles are separated during meiosis i in the formation of gametes. X linked- determines the sex of the o spring. Meiosis in females results in x- bearing eggs only. Meiosis in a mae results in a 1:1 ratio of x- bearing and y- bearing sperm. Random fertilization results in an expedited ration of 1/2 xx(female) and 1/2 xy(male) progeny. Reciprocal cross is two separate crosses of 2 phenotypes for5 a trait where the di erence between the 2 crosses is the sex of each phenotype. You cross a heterozygous smooth pea (rr) to a wrinkled pea (rr). You know that the r gene is autosomal. Both will produce half smooth and half wrinkled peas. Males and females are equally likely to.