Genetics Problem Test 1
Welcome to the electronic advancedbiology frontier classroom of the 21st century. The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding. However, the modern science of genetics, which attempts to understand the process of inheritance, only began with the work of Gregor Mendel in the mid-19th century. I wish you good luck and enjoy learning about genetics and heredity.
- 1.
In garden peas involving smooth and rough phenotypes. A phenotypic ratio of 3:1 in the F2 generation indicates that both parents (F1) are _____ for a single trait.- A.
Homozygous smooth
- B.
Heterozygous smooth
- C.
Homozygous wrinkle
- D.
Heterozgyous wrinkle
- 2.Describe the genotypes given for various garden pea traits. Determine the phenotype of the following: tall pea plant (T) and short pea plant (t). The genotype is [Tt]
- A.
Homozygous, dominant
- B.
Homozygous, recessive
- C.
Heterozygous, dominant
- D.
Heterozygous, recessive
- 3.Describe the genotypes given for various garden pea traits. Determine the condition of the following: tall pea plant (T) and short pea plant (t). The genotype is [tt]
- A.
Homozygous, dominant
- B.
Homozygous, recessive
- C.
Heterozygous, dominant
- D.
Heterozygous, recessive
- 4.Describe the genotypes given for various garden pea traits. Determine the condition of the following: round pea seeds (R) and wrinkled pea seeds (r). The genotype is [Rr].
- A.
Homozygous, dominant
- B.
Homozygous, recessive
- C.
Heterozygous, dominant
- D.
Heterozygous, recessive
- 5.
In a mating of black eyed, male mouse is crossed with a red eyed, female mouse. Black eyed (B) is dominant over red eye (b). If the F2 generation has a genotypic ratio of 1:2:1, what are the genotypes of the Parents in the P generation?
- A.
[BB] X [Bb]
- B.
[BB] X [bb]
- C.
(BB) X (Bb)
- D.
[Bb] X [Bb]
- 6.In dogs, there is an hereditary deafness caused by a _____ gene.
- A.
Dominant
- B.
Testcross
- C.
Incomplete
- D.
Recessive
- E.
Codominace
- 7.In four-o-clocks, (r) is red flower color and (w) is white flower color. If a male four-o-clock is pure red is pollinated with a female that is pink (rw). How many offspring from the total of 1,000 plants will be red in the F1 generation?
- A.
0
- B.
250
- C.
500
- D.
750
- E.
1,000
- 8.
In four-o-clocks, (r) is red flower color and (w) is white flower color. If a male four-o-clock is pure red is pollinated with a female that is pink (rw). How many offspring from the total of 1,000 plants will be pink?
- A.
0
- B.
250
- C.
500
- D.
750
- E.
1,000
- 9.
In four-o-clocks, (r) is red flower color and (w) is white flower color. If a male four-o-clock is heterozygous red is pollinated with a female that is pink (rw). How many offspring in the F1 generation from the total of 1,000 plants will be white?
- A.
0
- B.
250
- C.
500
- D.
750
- E.
1,000
- 10.In humans, brown eyes (B) are dominant over blue eyes (b). A brown-eyed man marries a blue-eyed woman and they have four children, two of who are brown-eyed and one is blue-eyed. What is the genotype of the father?
- A.
(BB)
- B.
(Bb)
- C.
[BB]
- D.
[Bb]
- E.
[bb]
- 11.
In humans, brown eyes (B) are dominant over blue eyes (b). A brown-eyed man marries a blue-eyed woman and they have four children, two of who are brown-eyed and one is blue-eyed. What is the genotype of the mother?
- A.
BB
- B.
Bb
- C.
[BB]
- D.
[Bb]
- E.
[bb]
- 12.
In humans, there is a gene that controls formation of hemoglobin, the protein in the red blood cells which carries oxygen to the body tissue. [S] is normal hemoglobin and [s] is abnormal hemoglobin. Identify a person's genotype with abnormal hemoglobin (sickle-cell trait) formation from the list below.
- A.
[SS]
- B.
(SS)
- C.
[ss]
- D.
Ss
- 13.
In pea plants, smooth seeds (S) are dominant to the wrinkled seeds (s). In a genetic cross of two plants that are heterozygous for the seed shape trait. What percent of the offspring should have smooth seeds?
- A.
0%
- B.
25%
- C.
50%
- D.
75%
- E.
100%
- 14.
In summer squash, white fruit color (W) is dominant over yellow fruit color (w). If a squash plant homozygous for the white is crossed with a plant homozygous for yellow, what is the genotype of the P generation of the male and female?
- A.
(WW) X (ww)
- B.
[WW] X [ww]
- C.
[Ww] X [Ww]
- D.
(ww) X (ww)
- E.
(WW) X (YY)
- 15.
In summer squash, white fruit color (W) is dominant over yellow fruit color (w). If a squash plant homozygous for the white is crossed with a plant heterozygous for white, what are the possible genotypes of the F1 generation offspring?
- A.
(WW) : (ww)
- B.
[WW] : [ww]
- C.
[Ww] : [Ww]
- D.
(ww) : (ww)
- E.
[WW] : [Ww]
- 16.The following mating of a male dog is heterozygous for the deafness gene. The female dog is homozygous for the deaf gene. The female had 10 puppies and the breeder discovers that all of of the puppies have normal hearing.
- A.
True
- B.
False
- 17.The following mating of a male dog is homozygous for the deafness gene [d]. The female dog is homozygous for the deaf gene. The female had 10 puppies and the breeder discovers what percent of the puppies are deaf? The genotype for normal hearing is [D].
- A.
0%
- B.
25%
- C.
50%
- D.
75%
- E.
100%
- 18.What is the dominant eye color in humans based upon genetic problems you have been presented with during introduction to genetics? (Please enter your answer using all lower case letters.)
- 19.
What is the name of this genetic blood condition?
- A.
Deafness
- B.
Sickle-cell
- C.
Hemophilia
- D.
Thalassemia
- 20._____ is a different form of genes for a single trait. Here is the genotype...[Mn]
- A.
Alleles
- B.
Dominant
- C.
Heterozygous
- D.
Recessive
- E.
Homozygous
- 21._____ gene that is always expressed or visible.
- A.
Alleles
- B.
Dominant
- C.
Heterozygous
- D.
Recessive
- E.
Homozygous
- 22._____ gene that is expressed only in the homozygous state.
- A.
Alleles
- B.
Dominant
- C.
Heterozygous
- D.
Recessive
- E.
Homozygous
- 23._____ genotypes made of the same alleles.
- A.
Alleles
- B.
Dominant
- C.
Heterozygous
- D.
Homozygous
- E.
Recessive
- 24._____ genotypes made of two different alleles.
- A.
Alleles
- B.
Dominant
- C.
Heterozygous
- D.
Recessive
- E.
Homozygous
- 25.Please check any of the genotypes that are homozygous recessive. (HINT: there are multiple answers for this question.)
- A.
Ee
- B.
[Ff]
- C.
[HH]
- D.
[qq]
- E.
[Ww]
- F.
[jj]
.jpg "In garden peas involving smooth and rough phenotypes. A phenotypic ratio of 3:1 in the F2 generation indicates that both parents (F1) are _____ for a single trait.")
![In humans, there is a gene that controls formation of hemoglobin, the protein in the red blood cells which carries oxygen to the body tissue. [S] is normal hemoglobin and [s] is abnormal hemoglobin. Identify a person's genotype with abnormal hemoglobin (sickle-cell trait) formation from the list below.
- ProProfs](/api/ckeditor_images/Blood_Sickle Cell Anemia_3.jpg "In humans, there is a gene that controls formation of hemoglobin, the protein in the red blood cells which carries oxygen to the body tissue. [S] is normal hemoglobin and [s] is abnormal hemoglobin. Identify a person's genotype with abnormal hemoglobin (sickle-cell trait) formation from the list below.")
.jpg "In pea plants, smooth seeds (S) are dominant to the wrinkled seeds (s). In a genetic cross of two plants that are heterozygous for the seed shape trait. What percent of the offspring should have smooth seeds?")
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