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WorksheetsUnit 5 Reassessment Practice
Total questions: 20
Worksheet time: 37mins
What is the biological sex of someone with two X chromosomes (XX)?
(a)
What is the biological sex of someone with one X and one Y chromosome (XY)?
(a)
Write an example of a homozygous recessive genotype using the letter R.
(a)
Write an example of a homozygous dominant genotype using the letter E.
(a)
Write an example of a heterozygous genotype using the letter T.
(a)
What is nondisjunction?
Missing chromosomes
Irregular chromosomes
Extra chromosomes
All of the above
Genetic variation is an example of a/an ______________ of sexual reproduction.
Advantage
Disadvantage
__________ produces somatic cells.
Mitosis
Meiosis
1. Red flower petals are an example of a ___________.
2. RR is an example of a ___________.
1. Phenotype
2. Genotype
1. Genotype
2. Phenotype
Asexual reproduction allows a population to grow more ________.
Slowly
Quickly
Some cell types have one copy of each chromosome while others have two copies. Select all cell types that have 1 copy.
Sperm cell
Liver cell
Egg cell
Nerve cell
Gamete
50% chance
0% chance
75% chance
100% chance
Asexual species are ________ stable as a population.
More
Less
During fertilization, gametes must be (a) in order to restore the diploid number in the zygote.
Hint: Haploid or Diploid
Increased stability of a species is a/an _____________ of sexual reproduction.
Advantage
Disadvantage
Meiosis produces __________ cells.
4 diploid
2 diploid
4 haploid
2 haploid
For monsters, being scary is a dominant trait. Sulley is scary, Mike is NOT. What are all their possible genotypes?
Sulley = MM or Mm
Mike = Mm
Sulley = MM or Mm
Mike = mm
Sulley = mm
Mike = MM and mm
A cell went through meiosis. The resulting daughter cells have 60 chromosomes each. How many chromosomes did the original parent cell start with?
15
30
60
120
Spongebob Squarepants has SUDS, a disease that makes him sneeze bubbles. SUDS is caused by the presence of a homozygous recessive gene. What must his parent's genotypes be if they do NOT have SUDS?
BB x BB
Bb x bb
BB x Bb
Bb x Bb
Scooby-Doo has four siblings. Some of them look like their parents, but others do not. Explain how this can be if you know that Great Danes have 39 pairs of chromosomes.
Each sibling inherited unique combinations of 39 chromosomes from Mumsy and 39 chromosomes from Dada.
Some siblings inherited more than 39 chromosomes from each parent.
Some siblings inherited fewer than 39 chromosomes from each parent.
Unique mutations led to the physical differences between the siblings.
