Genotype | MCQs

Explanation

Blood group A can have genotypes IAIA (homozygous) or IAi (heterozygous).

Since IAIA is one valid genotype for blood group A.

Explanation

Explanation

Phenotype refers to an individual's observable traits, such as height, eye color and blood type

A person's phenotype is determined by both their genomic makeup (genotype) and environmental factors.

Explanation

When a homozygous dominant individual mates with a homozygous recessive individual,

their offspring will all be heterozygous for that particular trait.

This results in a genotype of heterozygous (Aa) for all offspring.

Since the dominant allele masks the effect of the recessive allele, the phenotype of the F1 generation will exhibit the dominant trait.

Explanation

A genotype is homozygous if it has two identical alleles for a gene.

AA consists of two dominant alleles, making it homozygous.

Explanation

• T = dominant allele (e.g., tall)
• t = recessive allele (e.g., short)

Explanation

One parent (at least) must be heterozygous.

Blood group genetics:

Blood type is determined by three genes, A, B, and O. A and B are dominant over O, meaning if someone inherits even one A or B gene, they will have blood type A or B, respectively.

If they inherit two O genes, they will have blood type O. 

Scenario:

If one brother has blood type A (could be AA or AO genotype) and the other has blood type O (OO genotype), they must have inherited an O gene from each parent.

This means that at least one parent must be heterozygous (AO) for the A gene to produce an A blood type child and an O blood type child. 

Explanation

 A "hybrid" refers to an organism that has inherited different alleles for a trait from each parent, making it heterozygous. 

Explanation

An allele is an alternative form of a gene found at the same position (locus) on homologous chromosomes.

Alleles determine variations in inherited traits, such as flower color or blood type.

Explanation

Phenotype refers to the observable characteristics or traits of an organism (like eye color, height).

It results from the interaction of the genotype with the environment.