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WorksheetsUnit 5 Part 1 Test Corrections
Total questions: 10
Worksheet time: 5mins
The diagram shows a diploid cell with two homologous pairs of chromosomes.
Due to independent assortment, the possible allele combinations that could be found in gametes produced by meiosis are —
Bb, Dd, BB, and DD
BbDd and BDbd
Bd and bD
Bd, BD, bD, and bd
The Punnett square shows the cross between cabbage butterflies. B = white and b = yellow.
Why are all the offspring white?
Both parent butterflies were dominant for white color.
Only one parent butterfly carried recessive yellow traits.
Only one parent carried dominant and recessive color genes.
Both parent butterflies carried recessive genes for yellow color.
In guinea pigs, brown hair is dominant to white hair. The diagram shows chromosomes from a male guinea pig with brown hair and a female guinea pig with white hair.
A white-haired offspring resulting from the cross of these two guinea pigs MOST likely inherited genes from which two chromosomes?
1 and 2
1 and 3
2 and 4
3 and 4
In cattle the allele for cloven hooves (H) is dominant over the allele for mule-foot hooves (h). The phenotype for each trait is shown in this picture.What is the probability of cloven hooves in the offspring of parents that are heterozygous for the trait?
25%
50%
75%
100%
A species of plant produces purple or white flowers. The results of crossing a purple and a white flower and two white flowers are shown in the diagram.
Which of the following terms best describes the purple flowers?
Codominant
Recessive
Dominant
hybrid
The law of independent assortment states that the inheritance of alleles for one trait is not affected by the inheritance of alleles for a different trait if the genes for the traits are on __________________.
same chromosomes
separate chromosomes
homologous chromosomes
homozygous chromosomes
Independent assortment states that the alleles of two (or more) different genes get sorted into gametes independently of one another. Using the image below, what are the possible allele combinations that would be seen in each of the gametes created during Meiosis?
Rr, Yy, RR, YY
ry, rY, Ry, RY
ry and RY
Rr and Yy
An animal that has a genotype of one uppercase letter and one lowercase letter, such as Aa is called (a) .
An animal that has a genotype of two upper letters, such as AA is called (b) .
An animal that has a genotype of two lowercase letters, such as aa is called (c) .
Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what is the expected outcome of crossing two tomato plants that are heterozygous for hairy stems?
75% hairy stems: 25% hairless stems
100% hairy stems
100% hairless stems
50% hairy stems: 50% hairless stems
Black fur is considered dominant over yellow fur in Labrador Retrievers.
What is the probability of black fur in offspring of parents that are heterzygous for the trait?
50%
100%
75%
25%
