Mendelian Genetics and Punnett Squares

Chapter 4:

Genetic Inheritance:

4.1:Mendelian genetics 

Multiple Choice

The set of alleles for a trait of an organism is known as

 

• homozygous

• heterozygous

•  phenotype

• genotype

Multiple Choice

Alternative forms of a gene at a given locus are called

 

•  chromatids

• alleles

• loci

• chiasmata

Multiple Choice

If short fur (L) is dominant to long fur (l), what is the similarity between animals having genotype LL and ll?

 

• phenotype

• DNA

• genotype

• gene

Multiple Choice

An organism which has two allelic forms of a particular gene is---

• genotype

• hybrid

• heterozygous

• homozygous

Multiple Choice

In a fruit fly, the gene for grey body(B) is dominant over the gene for black body(b).Two grey fruit flies were mated and they produced 75 grey body flies and 25 black body flies.What is the most likely genotype of the parents

• bb x bb

• Bb x Bb

• Bb x bb

• Bb x BB

Open Ended

FIGURE 1 below shows the comb shape of the chickens. The rose comb is controlled by the dominant allele R while the pea comb is controlled by recessive allele r. A cross is made between a homozygous rose comb male and a homozygous pea comb female.

What are the genotypes of the progenies of F1 generation?

Open Ended

If the F₁ generation is self-crossed, state the genotypic and phenotypic ratio for F₂ generation?

Genotypic ratio   : _________________________

Phenotypic ratio : _________________________