Genetics & Genomics

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A & P Chapter 24
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College: First year
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1

Different alleles of the same gene are said to be

heterozygous.

2

An allele that is not expressed in the heterozygous condition is

recessive

3

A gene is

a DNA sequence that contains the information for producing one type of protein

4

In a simple dominant-recessive inheritance pattern, what percentage of the offspring would be expected to exhibit the dominant trait if the parents were heterozygous, and homozygous-recessive, respectively

50%

5

Identical alleles are said to be

homozygous.

6

An individual who is homozygous dominant for a trait can be symbolized

AA

7

An allele that masks the effect of another is

dominant.

8

The two types of chromosomes are

sex chromosomes and autosomes.

9

If the parent genotypes are Aa and Aa, the offspring are expected to be

1/4 AA, 1/2 Aa, 1/4 aa.

10

Which of the following would not be a possible blood type for the baby of a mother with type AB and a father with type B blood?

O

11

If the blood type gene i is present in the genotype, the person cannot have blood of type

AB

12

The processes that pass genetic information from generation to generation are

meiosis and fertilization.

13

The origin of the 46 chromosomes in a human zygote is

half from the sperm and half from the egg.

14

Which of the following is true in regard to the determination of the gender of a baby?

The sex chromosome in the sperm determines the gender of the baby.

15

A person with type A blood could have the genotype

IAIA or IAi.

16

Genetics is the study of

inheritance of characteristics.

17

Homologous pairs of chromosomes are

chromosomes from the mother and father that contain similar genetic information.

18

The human genome consists of

DNA, most of which does not encode protein.

19

How alike are our genomes?

Nearly 100%

20

If the parent genotypes are AA and aa, the offspring are expected to be

all Aa.