Homo Species Genes & Chromosomes – Biology

Homo Species Genes & Chromosomes – Biology Quiz 3 Ch. 4

Biology chapter 4 is about Homo Species, Genes & Chromosomes. Quiz 3 is based on this chapter.

Polymorphism refers to:

the presence of several distinct forms within a populationcorrect

a single gene that affects multiple aspects of the phenotype

a trait in which two alleles are co-dominant

many genes that affect a single aspect of the phenotype

A mother of known blood type A has a child whose blood turns out to be B. From this it follows that the mother:

could have several possible genotypes

must really have the blood type AB

is homozygous dominant for the trait

is heterozygous for the traitcorrect


involves an error in metabolism

is inherited as a dominant

is inherited as recessive and involves error in metabolism

is inherited as a recessivecorrect

Achondroplastic dwarfism is inherited as a dominant. Which of the following statements about the inheritance of dwarfism is false.

A mating between two non-dwarfs has a one in four probability of producing a dwarf child.correct

A person who is heterozygous for this trait would be a dwarf.

All dwarf children must have at least one parent who is also a dwarf.

A person who is homozygous recessive for this trait would not be a dwarf.

Which of the following statements is incorrect.

It is possible to have inherited a particular allele which is not expressed in the phenotype.

Genes may be expressed differently in males and females.

A feature, such as stature, may be the result of the action of several genes.

Genes always exist in two forms or alleles.correct

Individuals with an abnormal number of sex chromosomes:

all of these are correct

are always phenotypically female

often show abnormal sex organs and are sterilecorrect

rarely survive to adulthood

A person is phenotypically male only if that individual has:

one X chromosome

an XY chromosome combination

a number of Y chromosomes which outnumber or equal the number of X chromosomes

at least one Y chromosomecorrect

Not taking the possibility of mutation into account, if only one partner tests positive as a carrier of Tay-Sachs disease, the probability that they will have a child with the disease is:





A gene is

a segment of the DNA molecule recognizable by its specific functioncorrect

composed of lipid molecules

composed of proteins

a small segment of the transfer RNA molecule

Which of the following statements is not true about the Human Genome Project:

a complete human genome map would lead to improved diagnosis and treatment of genetic diseases

the project is an attempt to determine the base pair sequence for all human genes

the project will not be completed for another fifty yearscorrect

there is some concern that the project is not taking into account human diversity

Primates as a group are best defined in terms of their:


specialized skeletons


specialized dentition

An example of a shared ancestral feature of the primates is:

all of these are correctcorrect

retention of the clavicle

a placenta


Primates can be placed into two suborders: the Prosimii, and the:





In general, the lemuriformes are characterized by:

opposable thumbs

nocturnal habitscorrect

prehensile tails

all of these are correct

Which of the following traits is found exclusively among New World monkeys:


prehensile tailcorrect

opposable thumb

stereoscopic vision

The sexual skin:

is found only in New World monkeys

is used by males to attract females

is found instead of sexual dimorphism in some primates

swells and turns bright pink or red during estruscorrect

The catarrhine nose is found among the:

Apes & Old World Monkeyscorrect

Old World monkeys

New World monkeys

prosimians and tarsiers


All apes belong to the superfamily:






are closely related to bonobos

are knuckle-walkers

live in flexible social groups

all of these are correctcorrect


exhibit moderate sexual dimorphism

All of these are correctcorrect

have a long period of infant dependency

are omnivorous, with meat eating playing a large role

When compared with arboreal quadrupeds, terrestrial quadrupeds are identified by:

less flexibility in the shoulder

shorter fingers and toescorrect

significantly longer arms than legs

a more forward position of the foramen magnum

True brachiation is found in:

Old World monkeys

gibbons and siamangscorrect

chimpanzees and gorillas

New World monkeys

The intermembral index is a measure of:

the size of the brain relative to body size

the relative body sizes of two related species

the relative proportion of hindlimbs and forelimbscorrect

the relative body size of males as compared to females

Although it is not found or fully evolved in all species, an opposable thumb could be found as a characteristic of:

New World monkeys

Old World monkeys

All of these are correctcorrect


The foramen magnum is the:

curve that forms in the spine of humans

site of attachment for the nuchal muscle

site of attachment for the masseter muscle

hole in the base of the skull through which the spinal cord passescorrect

A jutting forward of the jaw, caused by the massiveness of the teeth and jaw, is known as:





The increase in brain size over and beyond that due to an increase in body size is measured by the:

endocast quotient

neocortex index

cranial index

encephalization quotientcorrect

The larger size of canine teeth in the male baboon as compared with the female is an example of:

allometric growth



sexual dimorphismcorrect

The sagittal crest develops in response to the development of a large:

leg muscle

neck muscle

jaw musclecorrect


In a study where a sample of the same basic proteins of humans and chimpanzees were compared, the percentage of amino acids that were found to be the same was:

80 percent

50 percent

65 percent

99 percentcorrect

The two species of early hominins known from South Africa are:

Australopithecus africanus and Paranthropus robustuscorrect

Australopithecus anamensis and Australopithecus afarensis

Australopithecus afarensis and Paranthropus boisei

Ardipithecus ramidus and Australopithecus afarensis

Kenyanthropus platyops is named after its most distinctive feature which is:

the appearance of a flat facecorrect

an enlarged brain case

the lack of bipedalism

reduced size of the canine teeth

Which of the following statements about the Taung child is NOT true?

The Taung child was discovered by Donald Johanson in Ethiopia.correct

The Taung child was originally classified as a hominin based on the forward position of the foramen magnum.

The Taung child is assigned to the species Australopithecus africanus.

Analysis of the dentition of the Taung child shows that prolongation of childhood, which characterizes modern humans, was not fully developed in Australopithecus.

The dentition of Australopithecus afarensis is characterized by a:

All of these are correctcorrect

dental arcade that is intermediate in shape between that of modern humans & apes

canine that projects above the tooth row

small diastema between the upper canine and premolar

The genus Paranthropus is characterized by:

the presence of a sagittal crestcorrect

the presence of a well-developed chin

very large incisors and canines

a cranial capacity of less than 400 cc

The oldest species of the genus Homo is:

Homo habiliscorrect

Homo erectus

Homo ergaster

Homo antecessor

The earliest hominin species to be found outside the African continent is:

Homo erectuscorrect

Homo habilis

Homo neandertalensis

Homo sapiens

Homo erectus is characterized by a:

All of these are correctcorrect

sagittal keel

relatively large facial skeleton as compared to H. sapiens

being platycephalic

Neandertal features include:

All of these are correctcorrect

forward projecting face

platycephalic skull

“bun-shaped” occipital

Homo ergaster is considered by those paleoanthropologists who originally split this new species off of what was previous called Homo erectus and those that agree with this split to be:

a species that predated Homo erectus in Africa and other areas, but in some ways displays characteristics more similar to Homo sapiens than to Homo erectus.correct

the earliest species in the genus Homo

a species that evolved from Homo erectus in Africa and other areas, but in some ways displays characteristics more similar to the Australopithecines than to Homo sapiens

an early species of the genus Homo that had cognitive abilities greater than modern humans.

Cro-Magnon populations were characterized by:

broad, small faces

large cranial capacities

prominent chin

All of these are correctcorrect

The replacement model for the evolution of Homo sapiens suggests:

Modern humans evolved one place and then spread out into different areas.

although evolution is continuous, paleoanthropologist who are proponents of the replacement model suggest that the earliest populations that we might call modern Homo sapiens, lived about 200,000

All of these are correctcorrect

modern humans evolved first in Africa

In terms of hominin evolution perhaps the most important part of the diet of early H. sapiens at Pinnacle Point, South Africa, was:


large game animals

fish and water fowl

drought resistant nuts and tubers

The “Mitochondrial Eve” hypothesis traces all modern populations back to:

Africa, 2 million years ago

Europe, 100,000 years ago

Africa, 200,000 years agocorrect

Asia, 150,000 years ago

There is evidence of modern looking populations in Europe by:

150,000 B.P.

38,000 B.P.correct

230,000 B.P.

62,000 B.P.

The find of Kennewick man implies:

all of these are correct

humans were in the New World much earlier than previously thought

Europeans arrived in the New World before those from Asia

European genes may have been included in the genome of the earliest arrivals to the New Worldcorrect

Beringia connected:

Asia to North Americacorrect

Asia to Europe

Europe to Africa

Africa to Australia

The Upper Paleolithic is often defined in terms of:

the hand ax

stone blade toolscorrect

the bow and arrow


After the Upper Paleolithic, people began to utilize the food resources of the environment more extensively. This period is known as the:


the Greater Paleolithic



In the Middle East, the correct sequence of culture history phases is:

Neolithic, Mesolithic, Paleolithic, Iron Age, Bronze Age

Paleolithic, Neolithic, Mesolithic, Iron Age, Bronze Age

Paleolithic, Mesolithic, Neolithic, Bronze Age, Iron Agecorrect

Mesolithic, Neolithic, Paleolithic, Bronze Age, Iron Age