Science_9E_Review(3Q)

In humans, the chromosomes containing the genetic material can be found in the cytoplasm of the cell.

• TRUE

• FALSE

Answer explanation

The chromosomes are located inside the nucleus.

According to Gregor Mendel’s experiment, traits of an organism could be categorized into two- expressed (dominant) and hidden (recessive).

• TRUE

• FALSE

The genotype RR (for seed shape) is interpreted as heterozygous for the dominant trait.

• TRUE

• FALSE

Answer explanation

: RR- homozygous dominant, Rr- heterozygous/ hybrid, rr homozygous recessive

Descriptors for seed shapes like “round” and “wrinkled” are examples of genotypes.

• TRUE

• FALSE

According to the Law of Segregation, two versions (alleles) of one trait segregate from each other during meiosis.

• TRUE

• FALSE

According to the Law of Independent Assortment, the inheritance of one trait is not affected by the inheritance of another trait.

• TRUE

• FALSE

In a monohybrid crossing, RR x rr results to 100% Rr.

• TRUE

• FALSE

In incomplete dominance, the appearance of a hybrid or heterozygous offspring follows the appearance of the recessive trait.

• TRUE

• FALSE

Answer explanation

: In incomplete dominance, appearance of a hybrid or heterozygous falls between the phenotypes of the two parents. No dominant or recessive traits.

Sex-limited traits are inherited by an individual from the X or Y chromosomes of the parents.

• TRUE

• FALSE

Answer explanation

: Sex-limited traits are generally autosomal, which means that they are not found on the X or Y chromosomes. Example- lactation is only expressed in females.

0. In inheritance due to multiple alleles, neither allele is dominant and more than two different phenotypes can occur.

• TRUE

• FALSE