Class Notes (836,999)
United States (324,882)
Biology (200)
BIO 1801 (48)
Lecture 25

BIO 1801 Lecture 25: Lecture 25 Bio 1801

4 Pages
Unlock Document

BIO 1801
Ray S.Williams

Clicker Question: Down’s syndrome is an example of: aneuploidy • Law of segregation ◦ if diploid organism with 2 alleles for each trait, during the gametes, gametes will separate for each other, when they recombine in the next generation, TT x tt Tt Tt Tt Tt male gametes go on top female gametes go on the side Tt (male) vs Tt (female) TT Tt Tt tt • TT: homozygous dominant • tt: homozygous recessive • Tt: heterozygous Y=yellow y=green Female: Yy Male: Yy YY Yy Yy yy phentotypic ratio 3:1 (3 yellow, 1 green) Genotypic ratio: 1 YY: 2 Yy : 1 yy Clicker Question: The allele for long fingers F is dominant to short (f) fingers. I f couple both with long fingers has an offspring with short fingers, what must be true? Both Parents are heterozygous for the trait Ft x Ft FF Ft Ft ff Test Cross • Dominant phenotype could be TT or Tt • Recessive phenotype must be tt If plant with dominant phenotype is TT all the offspring will be tall TT x tt Tt Tt Tt Tt Alternatively, if plant with dominant phenotype is Tt, half of the offspring will be tall and half will be dwarf Tt x tt Tt tt Tt tt Dihybrid cross • law of independent assortment ◦ alleles of different genes assort independently of each other during gametes formation • What is the genotype %? • 556 total plants YyRr x YrRr • YR, Yr, yr, yR x YR, Yr, yr, yR YYRR YYRr YyRr
More Less

Related notes for BIO 1801

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.