TEKS HS Biology - BIOL.6F Genetic Combinations
Quiz by Texas Education Agency
High School
Biology (2017)
Texas Essential Knowledge and Skills (TEKS)
Feel free to use or edit a copy
includes Teacher and Student dashboards
Measures 1 skill from
Measures 1 skill from
Track each student's skills and progress in your Mastery dashboards
With a free account, teachers can
- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet
12 questions
Show answers
- Q1If several pea plants with the genotype T TYy are crossed with pea plants with the genotype Ttyy, what percentage of the offspring will be expected to have the T TYy allele combination?50%40%25%75%60sBIOL.6f
- Q2In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?2 BB: 0 Bb: 2 bb1 BB: 2 Bb: 1 bb2 BB: 1 Bb: 0 bb0 BB: 2 Bb: 2 bb60sBIOL.6f
- Q3In the 1860s Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid crosses involve the study of the inheritance patterns related to two different traits. In guinea pigs the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur (F) is dominant over the allele for long fur (f). What percentage of the offspring from a BbFf x bbff cross would be expected to be heterozygous for both traits?50%0%100%25%60sBIOL.6f
- Q4Tomato 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?50% hairy stems: 50% hairless stems100% hairless stems75% hairy stems: 25% hairless stems100% hairy stems60sBIOL.6f
- Q5Facial dimples and free earlobes are both considered dominant human traits. What are the expected phenotypes of the offspring of a female with dimples and free earlobes (DDFf) and a male with no dimples and attached earlobes (ddff)?75% with dimples and attached earlobes and 25% with no dimples and free earlobes75% with dimples and free earlobes and 25% with no dimples and attached earlobes50% with dimples and free earlobes and 50% with dimples and attached earlobes50% with dimples and free earlobes and 50% with no dimples and attached earlobes60sBIOL.6f
- Q6Normal fruit flies have brownish-yellow bodies, and this body color is dominant. A mutation in the gene for body color can produce flies with an ebony body color. A homozygous normal fruit fly (e+e+) is crossed with a homozygous ebony fruit fly (ee). What is the predicted outcome of this genetic cross?All the offspring will have ebony bodiesOf the offspring, 75% will have ebony bodies, and 25% will have brownish-yellow bodiesAll the offspring will have brownish-yellow bodiesOf the offspring, 75% will have brownish-yellow bodies, and 25% will have ebony bodies60sBIOL.6f
- Q7The four butterflies in the illustrations represent the offspring in the F1 generation. Which statement is best supported by the phenotypes of these offspring?Two of the offspring in the F1 generation will experience a spontaneous mutationThe F1 generation is the result of a dihybrid crossTwo of the offspring in the F1 generation will not be able to reproduceThe F1 generation is composed only of males60sBIOL.6f
- Q8Chickens can have different types of feathers. Frizzled feathers curl toward a chicken's head. Assume that feather type is determined by a single gene and that the allele for frizzled feathers is dominant over the allele for straight feathers. In a cross between two chickens with straight feathers, what percentage of the offspring can be expected to have frizzled feathers?25%0%100%50%60sBIOL.6f
- Q9Albinism is an autosomal recessive condition. Which circle graph shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait?60sBIOL.6f
- Q10In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having horns (p). What is the expected phenotypic ratio of the offspring of a BbPp × BbPp cross if these alleles sort independently?9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned12 black/polled : 0 black/horned : 0 red/polled : 4 red/horned16 black/polled : 0 black/horned : 0 red/polled : 0 red/horned4 black/polled : 4 black/horned : 4 red/polled : 4 red/horned60sBIOL.6f
- Q11In humans blood type is determined by the A, B, and O alleles. The A and B alleles are codominant to each other and dominant over the O allele. An individual with the AO genotype and an individual with the BO genotype can produce offspring with which of the following phenotypes?A, B, or O onlyA, B, AB, or OO onlyA or B only60sBIOL.6f
- Q12In 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?75%25%50%100%60sBIOL.6f