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WorksheetsGenetic Assessment 1 test corrections
Total questions: 10
Worksheet time: 8mins
(7.L.2.1) DNA molecules are made of the following nitrogenous bases:
adenine, thymine, uracil, cytosine
thymine, guanine, phosphate, cytosine
adenine, thymine, uracil, guanine
adenine, thymine, cytosine, guanine
(7.L.2.1) Label the following structures from largest to smallest.
gene → nucleus→ DNA→cell→chromosome
nucleus→ gene→ DNA→chromosome→ cell
chromosome→cell→nucleus→DNA→gene
cell→Nucleus→chromosome→DNA→Gene
(7.L.2.1) A cricket has 22 chromosomes in each body cell (somatic). How many chromosomes are in each sex cell (egg or sperm) of a cricket?
5 chromosomes
11 chromosomes
22 chromosomes
44 chromosomes
(7.L.2.1) Which genes in the chromosome pair below are heterozygous?
AA, CC, ee only
AA, Bb, CC, dD
Bb, dD, Ff only
AA, CC, ee, Ff
(7L.2.3) An organism’s traits are the result of genes (inherited) and the environment (acquired). Which trait may change due to environmental (acquired) factors?
attached earlobes
blood type
dimples
height
(7.L.2.1) Which would allow a species to survive environmental changes?
similar physical features
low mutation rate
small population size
genetic variation/ biodiversity
(7.L.2.1) Which is the best description of offspring produced by asexual reproduction?
They are physically and genetically identical (clone) to their parents.
They are physically and genetically different (50%) from their parents.
They are genetically different and physically identical to their parents.
They are genetically identical to their parents, but physically different.
(7L.2.2) Freckles (F) are dominant to no freckles (f). The diagram shows a cross between a homozygous dominant parent (FF) and a parent of unknown genotype. What is the genotype and phenotype of the missing parent?
homozygous dominant for freckles
heterozygous for freckles
homozygous recessive for no freckles
heterozygous for no freckles
(7.L.2.2) In an experimental cross between pea plants, 8,000 seeds were created; 6,000 yellow (Y) and 2,000 green (y) seeds. What are the genotypes of parents for the offspring in the chart? (Hint: Construct Punnett squares with the possible genotypes of the parents.)
Yy x Yy
YY x yy
Yy x yy
YY x YY
(7.L.2.2) John and Rochelle have three daughters. What are the chances their next child will be a boy?
(12.5%) 1 out of 8
(25%) 1 out of 4
(75%) 3 out of 4
(50%) 1 out of 2
