Genetics Question Preview (ID: 60449)


7th Grade. TEACHERS: click here for quick copy question ID numbers.

A ___ offspring is the offspring of many generations that have the same form of a trait.
a) purebred
b) hybrid
c) heterozygous
d) genotype

Which of the following is an acquired trait?
a) language
b) height
c) flower color
d) all of the above

Which of the following is a heterozygous genotype?
a) Yy
b) YY
c) yy
d) YNOT?

Which of the following desribes a pattern of inheritance in which one allele is only partially dominant?
a) incomplete dominance
b) codominance
c) acquired traits
d) multiple alleles

Genes are carried from parents to offspring on structures called
a) chromosomes
b) alleles
c) phenotypes
d) genotypes

In the first division of meiosis,
a) chromosome pairs separate and move to opposoite ends of the cell.
b) chromosome pairs are split at the centromere
c) 4 daughter cells are created
d) chromosomes are not in the cell

When sex cells join together in the process of fertilization,
a) the fertilized egg has the original number of chromosomes.
b) the fertilized egg has half the original number of chromosomes.
c) the fertilized egg has twice the original number of chromosomes
d) the fertilized egg has a random amount of chromosomes.

Female sex cells are called
a) eggs
b) sperm
c) pistils
d) stamen

Half of an organism's alleles come from mom and half from dad.
a) true
b) false
c)
d)

Human body cells have
a) 46 chromosomes
b) 46 pairs of chromosomes
c) 23 chromosomes
d) 24 chromosomes

Which genotype is homozygous?
a) TT and tt
b) TT
c) tt
d) Tt

Which of the following is considered a hybrid?
a) Tt
b) tt
c) TT
d)

A chart that shows all the possible ways alleles can combine in a genetic cross is called a
a) Punnett square
b) Mendel square
c) Sutton square
d) Darwin chart

How do recessive traits show up?
a) if the organism inherits 2 recessive alleles
b) if the organism has 1 dominant and 1 recessive allele
c) if the organism has no recessive alleles
d) if the organism has at least 1 recessive allele.

What were the offspring like in the F2 generation (when Mendel let the F1 generation self pollinate)?
a) 75% tall, 25% short
b) 75% short, 25% tall
c) 50% tall, 50% short
d) 100% tall, 0% short

The male part of the flower is the
a) stamen
b) stigma
c) pistil
d) ovule

How did Mendel keep his pea plants from self-pollinating?
a) he cut off the stamens of some flowers.
b) he cut off the pistils of some flowers.
c) he cut off all the flowers on one plant.
d) he covered the pistil with a tiny glass container.

The result of a coin toss will affect the result of the next coin toss.
a) false
b) true
c)
d)

An organism's __ is its genetic makeup.
a) genotype
b) phenotype
c) heterozygous
d) homozygous

Genetic changes can happen by
a) all of the above
b) pollutants can affect genes.
c) random chance
d) tobacco smoke affecting genees

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