Question

Consider the chart below, which shows that a specific trait A is seen in the parents as well as the offspring.

https://online.columbiasouthern.edu/bbcswebdav/pid-5516217-dt-content-rid-112697000_1/xid-112697000_1

Which of the following statements is true about the trait?

There is no heritability.

There is weak heritability.

There is strong heritability.

Heritability cannot be determined from this chart.

1.

Which nitrogenous base pairs with adenine in a DNA molecule?

Cytosine

Thymine

Uracil

Guanine

1.

What term describes phenotypic features that are coded for by several genes, such as eye color in humans?

Linked

Polytrophic

Polygenic

Codominant

1.

For what purpose is the polymerase chain reaction (PCR) used?

To analyze a person's fingerprints

To isolate fragments of DNA

To make many copies of a small amount of DNA

To determine a child's hereditary traits

Answer 1

1. In a DNA molecule , adenine can form two hydrogen bonds with thymine.

base pairs in a DNA molecule only occurs between adenine and thymine with two hydrogen bonds, and guanine and cytosine with three hydrogen bonds.

1. answer is polygenic.

it means polygenic traits are controlled by two or more than two genes at different loci on different chromosomes. Many characters that display continuous variation are controlled by genes at many loci.

1. answer is to make many copies of small amount of DNA

Using PCR, copies of DNA sequences are exponentially amplified to generate thousands to millions of more copies .of that particular DNA segment.