Genetics -Essentials of Bio-EdoM

What would be the result of a cross between a heterozygous tall plant with a homozygous dominant tall plant? (T=tall, t=short) (create a Punnett square to help you)

• 50% tall : 50% short
• 25% tall : 75% short
• 75% tall : 25% short
• 100% tall

 What is a gamete?

• The chemical factor that determines the traits you have
• The form of a gene that is ALWAYS seen.
• The study of genes and heredity
• The sex cells (egg or sperm cell)

What is fertilization?

• An organism with two of the same alleles for a gene
• The study of genes and heredity
• When an egg and a sperm cell combine to form a new individual
• Sex cells (egg or sperm cell)

 What is an allele?

• The study of genes and heredity
• Cross between parents with different traits
• Sex cells
• Different forms of a gene

Organisms that have two of the same alleles for a particular trait are _________

• Hybrid
• Homozygous
• Heterozygous
• Dominant

Which set of letters represent a heterozygous individual?

•  Tt
• TT
• tt
• All of the others

Which of the following explains a dominant allele?

• Two of the same alleles
• A trait that cannot be seen
• The trait that is ALWAYS seen
• The trait that is only seen when there are two identical copies present

Which of the following are recessive?

• BB
• Bb
• bb
• all of the others

What is a genotype?

• Two of the same alleles
• The two alleles (letters) that represent a gene
• The trait that is ALWAYS seen
• A trait that can be physically seen

What is a phenotype?

• An organism with two of the same alleles for a gene
• The two alleles (letters) that represent a gene
• The form of a gene that is never seen
• A trait that can be physically seen