LEAP 2025 Biology Chapter 1

LEAP 2025 Biology Chapter 1 Sample

1 pt
1.

In orchids, flower color and fragrance are two genetic traits. Each trait is located on a separate chromosome. In orchids, the allele for producing blue flowers (B) is dominant to the allele for producing white flowers (b). The allele for producing strong fragrance (F) is dominant to the allele for producing little fragrance (f). Two orchids that have genotypes that are heterozygous blue flowers and strong fragrance (BbFf) were crossed. Use the completed Punnett square to determine the probability of offspring that have both blue flowers and strong fragrance.

1pt
5.

Under an electron microscope, a scientist can observe the

, which resemble rungs in a ladder.

1 pt
6.

A geneticist used a DNA sequencer to detect the base pair sequencing for a patient. The instrument printed the following table. Drag the correct answer into each box to show the base pair sequencing the instrument printed.

Reset

Adenine

Drop answer here

Guanine

Drop answer here

Insulin

Hemoglobin

Uracil

Guanine

Adenine

Thymine

Cytosine

1 pt
9.

Select the correct answer.

The DNA segments of possible offspring are shown in the table above. List the individuals in order from most related to least related.