Genetics: Heterozygous and Homozygous Concepts

The video tutorial explains the genetic terms homozygous and heterozygous, describing how they relate to the genetic makeup of organisms. Homozygous refers to having two identical alleles for a gene, while heterozygous means having two different alleles. The tutorial uses pea plants as examples to illustrate these concepts, explaining that homozygous individuals produce offspring with the same phenotype, whereas heterozygous individuals can produce offspring with different phenotypes. The video concludes with a reminder about the importance of kindness.

What does the term 'heterozygous' imply in genetics?

• Two different alleles

• Two identical alleles

• A single allele

• No alleles

In genetics, what does 'homozygous' mean?

• Two identical alleles

• Two different alleles

• A single allele

• No alleles

What is the dominant seed color in pea plants?

• Green

• Blue

• Yellow

• Red

How is a homozygous dominant trait represented?

• Numbers

• Mixed case letters

• Capital letters

• Lowercase letters

What does it mean if an organism is heterozygous for a gene?

• It has two different alleles

• It has two identical alleles

• It has three alleles

• It has no alleles

Which seed color alleles would a heterozygous pea plant have?

• Two green alleles

• Two yellow alleles

• No alleles

• One yellow and one green allele

What is the phenotype of offspring from homozygous individuals?

• Never the same

• Always different

• Sometimes the same

• Always the same

What can heterozygous individuals produce in terms of phenotype?

• Only one phenotype

• Either of two phenotypes

• No phenotype

• Three phenotypes