Fundamentals of Genetics: Hybrid Cross

The video tutorial explains the concept of hybrid plants, focusing on the cross between homozygous tall and short pea plants resulting in heterozygous hybrids. It introduces the use of a Punnett square to predict the genotypes and phenotypes of offspring from hybrid crosses. The tutorial details the dominant and recessive traits, showing how tallness is dominant over shortness. It concludes with an explanation of hybrid crosses and their outcomes.

What is the result of crossing a homozygous tall pea plant with a homozygous short pea plant?

• Offspring are a mix of homozygous tall and short.

• All offspring are heterozygous.

• All offspring are homozygous short.

• All offspring are homozygous tall.

What is a hybrid in genetic terms?

• An organism with three alleles for a trait.

• An organism with no alleles for a trait.

• An organism with two different alleles for a trait.

• An organism with two identical alleles for a trait.

In a Punnett square, what is the phenotype of an offspring with the genotype 'Capital T and lower case T'?

• Short

• Tall

• Cannot be determined

• Medium height

Which genotype results in a short phenotype?

• Capital T and Capital T

• Lower case T and lower case T

• Capital T and lower case T

• Capital T and Capital S

What is a hybrid cross?

• Crossing a homozygous and a heterozygous organism

• Crossing two homozygous organisms

• Crossing two organisms with no alleles

• Crossing two heterozygous organisms