2 What could be the genotypeoftheparents whohave a Two kids

2. What could be the genotype-of-the-parents who-have a. Two kids one of which is tongue roller and the bittertaster (homozygous forboth traits) and the other is anon-rollerandnon taster. Note, both abilities are dominant traits e- b. Two kids, both of which are Doarollers and Dontasters, 3. Analyze a pedigree chart of a disease inheritance (allstudents). a. Assess what the type of inheritance it is T b. Write 2 characteristics that support your answer. 4 s

Solution

2. A. Both these triats (Tongue roller and bitter taster) are autosomal dominant triats. Now here one offspring posseses both triats and is homozygous dominant for both and other offspring posseses none of these triats. This information reveals us that offspring second is homozygous recessive for both triats. Its genotype we can write as ttbb , where allele t and b are recessive alleles for rolling tongue and bitter taste respectively.

Therefore genotype of first offspring ( since it is homozygous dominant for both the triats ) can be written as TTBB.

Now genotype of two parents must be as

1. TtBb

2. TtBb.

Only these two types of genotypes can produce offsprings which is homozygous for both tongue roller and bitter taste ( TTBB) and offspring with non roller snd non taster triat (ttbb)