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Worksheets8.3 mendel an heredity
Total questions: 21
Worksheet time: 21mins
A particular variety of onions has two layers colors. Purple color (MM) is dominant over white color(mm). The Punnett square below shows the cross between two onion plants with purple grains. What percentage of the offspring will have white color?
0%
25%
50%
75%
Use the Punnett square to answer the question.
A horse with a grey colored hair (Tt) is crossed with a horse that has a white colored hair (tt). How many offspring will have a grey colored hair?
0%
25%
50%
75%
In a certain variety of buttlerflies, pink wings appear in the majority of buterflies and yellow wings appear only in a few buterflies. Which statement correctly describes the two traits?
Both flower colors are dominant traits.
Both flower colors are recessive traits.
Pnk is a dominant trait and yellow is a recessive trait.
Yellow is a dominant trait and pinkis a recessive trait.
Mutations alter the structure of a molecule that aids in the transmission of genetic information. The molecule is
fat
dna
protein
carbohydrate
What is the most typical method for ensuring desirable features, or traits, in animal offspring?
selective breeding
gene splicing
cloning
selective mutations
A plant that has red flowers was crossed with a plant that has white flowers. All of the offspring produced pink flowers. In this plant:
the gene for red flowers is dominant.
the gene for white flowers is dominant.
neither gene for flower color is dominant.
a new gene for pink flower color probably formed in a mutation.
Two tall pea plants, not true for tallness, are crossed. 56 tall plants and 14 short plants are produced from this cross. The allele for tallness is
codominant.
incomplete.
recessive.
dominant
If the two parents represented in the Punnett square are about to produce their first offspring, the Punnett square tells you that the offspring ____________.
will definitely have the genotype Aa.
will definitely have the genotype aa.
has a 25% chance of having the genotype Aa.
has a 50% chance of having the genotype aa.
.
In a mouse, black colored fur (F) is dominant over white colored fur (f). A cross between black colored mouse and white colored mouse is shown in the Punnett square below.
The genotypes of offspring in box 1 and box 2 are ________.
ff and Ff
Ff and ff
Ff and Ff
FF and Ff
Use the picture to answer the question.
blueeye
A cross between two brown eyed parents is shown above. Which statement BEST explains why blue eyes appear only in 25% of offspring?
It is a mutated trait.
It is a recessive trait.
It is a dominant trait.
It is an acquired trait.
In a cross between two pea plants, trait for yellow seed color appears when the expressed gene has one or both alleles for yellow color. Green color appears only when both alleles code for green color. What conclusion can be drawn from the statement?
Both yellow color and green color are acquired traits.
Yellow color is a normal trait while green color is a mutated trait.
Yellow color is a dominant trait while green color is a recessive trait.
Yellow color is a recessive trait while green color is a dominant trait.
The Punnett square below shows a cross between a horse with a pure black (CC) coat and a horse with pure chestnut (cc) coat.
What can be concluded about the trait of pure black coat in the offspring?
It is a dominant trait.
It is a recessive trait.
It is neither a dominant nor a recessive trait.
It is an acquired trait.
A test cross is performed on a purple flower with an unknown genotype. The results of the cross are 50% purple and 50% white flowers. White flowers are a recessive trait. What is the genotype of the original purple flower?
PP
Pp
pp
either PP or Pp
Look at the Punnett square.
If the two parents represented in the Punnett square have four offspring, what does the Punnett square tell you?
Two of the offspring will definitely have the genotype Aa.
It is more likely that two of them will have the genotype Aa than the genotype aa.
Each of the 4 offspring has a 50% chance of having genotype Aa.
It is less likely that two of them will have the genotype Aa than the genotype aa.
Two parents have the genotype Aa. Which statement best describes the possible genotypes of the offspring?
All their offspring will have the genotype Aa.
On average 25 percent of their offspring will have the genotype Aa.
On average 50 percent of their offspring will have the genotype Aa.
None of their offspring will have the genotype Aa.
Some species of bacteria have become resistant to antibiotics that treat infections. Which of the following explains why bacteria may become resistant?
The bacteria did not like the taste of the antibiotic.
Some bacteria had a mutation that made them unaffected by the antibiotic.
Most of the bacteria were negatively affected by the antibiotic and died.
The bacteria changed into viruses, which are not treated with antibiotics.
In the cross between a brown haired rabbit (Bb) and a white haired rabbit (bb), what percentage of the offspring will exhibit the dominant trait and what percentage will exhibit the recessive trait?
50% dominant and 50% recessive
0% dominant and 100% recessive
100% dominant and 0% recessive
75% dominant and 25% recessive
A pair of purebred black curly coated dogs produced offspring that were also black and had four legs and curly coats. What does this illustrate?
Black fur is recessive in this species.
Many of a species' traits remain the same from generation to generation.
Curly coats are recessive in this species.
Many of a species' traits change from generation to generation.
RNA is the molecule that helps to transmit hereditary information from parents to offsrping
True
False
DNA is the molecule that helps to transmit hereditary information from parents to offsrping
True
False
is the process, used by farmers and breeders, of selecting specific individuals for mating to produce offspring with desired traits.
selective breeding
selective mutation
artifitial mutation
genetic engineering
