Genetics Crosses

What is the term used for a genetic cross involving only one trait?

• Co-Dominance

• Dihybrid

• Incomplete Dominance

• Monohybrid

Answer explanation

Monohybrid is the term used for a genetic cross involving only one trait. It is the correct choice because it refers to the specific type of cross being described in the question.

Tags

NGSS.HS-LS3-1

Which type of genetic cross shows complete dominance?

• Incomplete Dominance

• Co-Dominance

• Dihybrid

• Monohybrid

Answer explanation

Monohybrid cross shows complete dominance.

In an incomplete dominance cross, what is the phenotype of a heterozygous genotype?

• No traits expressed

• Dominant trait

• Recessive trait

• Blend of traits

Answer explanation

In an incomplete dominance cross, a heterozygous genotype results in a blend of traits.

What is the term used for a genetic cross involving two traits?

• Dihybrid

• Incomplete Dominance

• Monohybrid

• Co-Dominance

Answer explanation

A genetic cross involving two traits is called a dihybrid cross. This term refers to the inheritance of two different traits simultaneously.

Which law states that the traits in a dihybrid cross are not dependent on each other?

• Law of Dominance

• Law of Independent Assortment

• Law of Segregation

• Law of Genetic Variation

Answer explanation

The Law of Independent Assortment states that the traits in a dihybrid cross are not dependent on each other.

In co-dominance, if an organism has the genotype FBFW, what will be the phenotype?

• Black feathers

• White feathers

• Both black and white feathers

• No feathers

Answer explanation

The phenotype of an organism with the genotype FBFW in co-dominance is both black and white feathers.

Tags

NGSS.HS-LS3-1

What is the key difference between co-dominance and incomplete dominance?

• In co-dominance, both traits are expressed fully, while in incomplete dominance, traits blend together

• In co-dominance, traits blend together, while in incomplete dominance, both traits are expressed fully

• In co-dominance, one trait is dominant, while in incomplete dominance, both traits are expressed fully

• In co-dominance, both traits are recessive, while in incomplete dominance, one trait is dominant

Answer explanation

Co-dominance is when both traits are fully expressed, while incomplete dominance is when traits blend together. The correct choice is that in co-dominance, both traits are expressed fully, while in incomplete dominance, traits blend together.

What is the possible genotype of an organism showing co-dominance for two traits represented by the letters F and G?

• FFGG

• FG

• FF or GG

• FGFG

Answer explanation

The possible genotype of an organism showing co-dominance for two traits represented by the letters F and G is FGFG. This genotype represents the co-dominant expression of both traits.

What is the term used to describe the situation where the heterozygote expresses both traits simultaneously?

• Co-Dominance

• Incomplete Dominance

• Monohybrid

• Dihybrid

Answer explanation

Co-Dominance is the term used to describe the situation where the heterozygote expresses both traits simultaneously.

What is the phenotype of an organism with the genotype RR in a complete dominance scenario?

• Recessive trait

• Dominant trait

• Blend of traits

• No traits expressed

Answer explanation

In a complete dominance scenario, the phenotype of an organism with the genotype RR is the dominant trait.

Tags

NGSS.HS-LS1-1