Science Questions

Which enzyme is responsible for unwinding the DNA double helix during replication?

In a dihybrid cross, what is the probability of obtaining an offspring with the genotype rryy?

If a heterozygous tall plant (Tt) is self-pollinated, the ratio of pure tall to hybrid tall to pure dwarf in the offspring is:

The 'Law of Purity of Gametes' is another name for:

How many codons are there in the genetic code for translating 20 amino acids?

Crossing over occurs during which phase of meiosis?

If a child has blood group AB and the mother has blood group A, what can NOT be the blood group of the father?

What is the genotype of a male with color blindness?

The specific sequence of three nucleotides on tRNA that pairs with a codon on mRNA is called:

Which of the following describes a 'Nullisomy'?

In a DNA molecule, the strands are 'antiparallel'. This means:

Who proposed the 'Chromosomal Theory of Inheritance'?

The process of protein synthesis from mRNA is called:

What is the phenotypic ratio in the F2 generation of a dihybrid cross if the traits show incomplete dominance?

An individual with the genotype AaBb will produce how many types of gametes?

Which of the following is an example of continuous variation?

A mutation that involves the replacement of a single nitrogenous base with another is called:

What is a 'Cistron'?

In a test cross involving F1 dihybrid (RrYy), the phenotypic ratio will be:

What determines the primary structure of a protein?