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WorksheetsBasis of Life Chapter 3
Total questions: 44
Worksheet time: 27mins
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
What is one advantage of sexual reproduction?
offspring are identical to parents
offspring are resistant to viruses
offspring are born live, rather than from eggs
offspring inherit a wider variety of genetic information
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
This figure shows what type of asexual reproduction?
budding
vegetative reproduction
animal regeneration
Which of the following could be a trait of a pine tree?
furry
flat needles
pink flowers
Which of the following is NOT an example of a phenotype of a giraffe?
brown spots
nucleus
long neck
A segment of DNA is a _______________.
trait
gene
cell
Which of the following is NOT a result of cell division
reproduction
growth
nutrition
Which of the following is part of asexual reproduction?
one parent organism
two parent organisms
meiosis
Which of the following is NOT a disadvantage of asexual reproduction?
do not need a mate
little genetic variation
mutations can occur
Small changes in traits that cause variation are frequently caused by _________________.
natural selection
competition
mutations
Humans can change an organism's ________________ by choosing which organisms will reproduce.
food
genes
predators
Specific traits for a show dog is an example of _______________.
natural selection
selective breeding
behavioral adaptation
The characteristics of an organism are called ____________.
traits
genetics
heredity
One of the first people to study inherited traits was _______________.
Robert Hooke
Gregor Mendel
George Forman
Inherited traits are passed on from parents to their _________________.
friends
grandparents
offspring
The field of biology that studies heredity is called _____________.
Ecology
Genetics
Chemistry
Each trait of an organism is determined by at least ____________ gene from each parent.
one
two
three
An organism is __________________ if it has two like genes for a given trait.
heterozygous
recessive
homozygous
Organisms that have two unlike genes for a trait are _______________ for that trait.
heterozygous
recessive
homozygous
The gene that always shows itself is the ______________ gene.
dominant
recessive
heterozygous
The gene that is hidden in a heterozygous organism is the _______________ gene.
dominant
recessive
homozygous
A pea plant with one tall gene and one short gene is called __________________________.
homozygous
heterozygous
recessive
A pea plant with two tall genes is called _________________.
homozygous
heterozygous
recessive
What two combinations of genotypes could a tall pea plant have?
Tt, TT
Tt, tt
TT, tt
What does the capital letter show about a gene?
The recessive trait
The dominant trait
The homozygous recessive trait
A lowercase letter always represents a _____________ gene.
dominant
recessive
homozygous dominant
The X and Y chromosomes determine the ______________ or sex of an organism.
gender
eye color
height
A fertilized egg that has two X chromosomes will develop into a _________________.
girl
boy
plant
A fertilized egg that has an X and Y chromosome will develop into a ______________.
girl
boy
plant
Mendel found that when he crossed homozygous tall pea plants with homozygous short pea plants, the offspring were all _______________.
short
tall
medium height
Humans have ___________ pairs of chromosomes.
46
23
64
Male organisms have ________________.
two X chromosomes
two Y chromosomes
One X and one Y chromomsome
A ________________________ is a chart used to show possibel gene combinations and the probability of each combination occurring.
Punnett Square
Dichotomous Key
Tally Chart
