Biology
Practice Biology MCQs from the Science syllabus.
A cross between an F1 hybrid and its homozygous recessive parent is called a:
In a dihybrid cross between RRYY (Round Yellow) and rryy (Wrinkled Green), what is the phenotype of the F1 offspring?
How many types of gametes are produced by a plant with the genotype RrYy?
Which of Mendel's laws is based on the results of a dihybrid cross?
What is the phenotypic ratio of a dihybrid cross in the F2 generation?
If a color-blind man marries a woman with normal vision (homozygous), what is the probability that their son will be color-blind?
Which component of a nucleotide differs between DNA and RNA?
In a cross between Tt and tt, what is the expected ratio of phenotypes?
The process of copying a segment of DNA into RNA is called:
Which of the following represents a Klinefelter syndrome chromosome complement?
Down syndrome is caused by the presence of an extra chromosome at which position?
A human female with Turner syndrome has how many chromosomes?
What is the relationship between Adenine and Thymine in a double-stranded DNA molecule?
How many hydrogen bonds are formed between Guanine and Cytosine?
In Mendel's dihybrid cross, how many recombinant (new) phenotypes were observed in the F2 generation?
If a mother is a carrier for hemophilia (XhX) and the father is normal (XY), what is the chance of having a hemophilic daughter?