Biology
Practice Biology MCQs from the Science syllabus.
What would be the phenotypic ratio in the F1 generation of a cross between $TT$ and $tt$?
If a man with color blindness marries a woman with normal vision (non-carrier), what is the chance their son will be color blind?
How many total alleles for a single gene does an individual typically have in their somatic cells?
The law which states that alleles for different traits are distributed to gametes independently is:
What is the specific location of a gene on a chromosome called?
A cross between an F1 individual and one of its parents is called a:
During which phase of the cell cycle does DNA replication occur?
What kind of bonds hold the nitrogenous bases together in the center of the DNA molecule?
The 1:2:1 phenotypic ratio is characteristic of which pattern of inheritance in the F2 generation?
If a dwarf plant is treated with gibberellins and it grows tall, what will be the height of its offspring when self-pollinated?
In a dihybrid cross ($RRYY \times rryy$), what is the probability of getting an $RrYy$ genotype in the F2 generation?
Which syndrome is caused by the presence of an extra 21st chromosome (Trisomy 21)?
The sequence of bases on one DNA strand is ATGC. What is the complementary sequence on the other strand?
What is the chromosomal constitution of a person with Turner Syndrome?
A person with Klinefelter Syndrome has the following sex chromosomes:
How many different types of gametes can be produced by an organism with the genotype $AaBb$?