Question

QUESTION 1

1. What is the phenotypic ratio of a monohybrid cross?

   		3:1
   		1:2:1
   		9:3:3:1
   		1:1

4 points   

QUESTION 2

1. What is the phenotypic ratio of a dihybrid cross?

   		3:1
   		1:2:1
   		9:3:3:1
   		1:1

4 points   

QUESTION 3

1. What is the genotypic ratio of a monohybrid cross?

   		3:1
   		1:2:1
   		9:3:3:1
   		1:1

4 points   

QUESTION 4

1. A testcross is used to determine which of the following?

   		The phenotype of an individual with a dominant genotype
   		The phenotype of an individual with a recessive genotype
   		The genotype of an individual with a dominant phenotype
   		The genotype of an individual with a recessive phenotype

4 points   

QUESTION 5

1. In RNA, adenine pairs with _______________ with _____________ bonds and guanine pairs with ___________________ with __________________________ bonds.

   		uracil, triple, thymine, double
   		uracil, double, thymine, triple
   		uracil, triple, cytosine, double
   		uracil, double, cytosine, triple

Answer 1

1. The phenotypic ratio of a monohybrid cross is 3:1.

Monohybrid cross means A cross between two homozygous parent plants.

1:2:1 is the genotypoc ratio of monohybrid cross.

9:3:3:1 is the Dihybrid cross phenotypic ratio.

So option ''A'' is the correct answer.

2.The phenotypic ratio of a dihybrid cross is 9:3:3:1.

It is the classic mendelian ratio.

So option ''C'' is the correct answer.

3. The genotypic ratio of a monohybrid cross is 1:2:1.

1:2:1 means 1 homozygous tall:2 heterozygous tall:1 homozygous recessive.

So option ''B'' is the correct answer.