BIOLOGY QUIZ 2
Someone who has the blood type AB had parents with _____ genes. heterozygous codominant homozygous incomplete dominant
codominant
In the cross BB x bb, the percent of offspring in the F1 generation that will have the same genotype as one of their parents is _____. 50% 25% 100% 0%
0%
The probability that both of two tossed coins will come down heads is _____. 1/4 1/16 1/8
1/4
If the parent genotypes are Aa and Aa, the offspring are expected to be _____. 1/2 AA and 1/2 aa 3/4 AA and 1/4 aa all Aa 1/4 AA, 1/2 Aa, 1/4 aa
1/4 AA, 1/2 Aa, 1/4 aa
What is the genotype ration between the cross YyRr x YyRr? 1. 2YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:yyrr 2. YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:2yyRr:yyrr 3. YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:yyrr 4. YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:2yyrr
2.YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:2yyRr:yyrr
The F2 generation phenotypes resulting from the monohybrid cross of purebreds display a ratio of _____. 4:1 2:1 3:1 none of the above
3:1
In considering the cross YyRr x YyRr, the phenotype ratios of the F2 generation will be _____. 4:1 3:1 9:3:3:1 1:3:1
9:3:3:1
_____ interact to produce a trait in which neither dominant gene can produce its effect in the presence of the other. Multiple alleles Chromosomes Sex linked genes Carriers
Multiple alleles
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in a ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable genotypes of the snapdragons in your garden? RR and Rr RR only Rr only rr only RR and rr
Rr only
Which cross will yield four phenotypes in the 1:1:1:1 ratio? rryy x rryy RrYy x RrYy RRYY x rryy RrYy x rryy
RrYy x rryy
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)? all white all red unable to determine half red and half white
all red
In a dihybrid cross, round (RR), yellow (YY) seeds were crossed with wrinkled (rr), green (yy) seeds. What were the phenotypes of the F1 generation? 3:1 (round and yellow to wrinkled and green) all wrinkled and green all round and yellow half round and yellow; half wrinkled and green
all round and yellow
Different forms of a given gene are known as _____. chromosomes dominants alleles recessives
alleles
Mendel's principle of segregation implies that the two members of an allelic pair of genes _____. are segregated pair-wise are distributed to separate gametes may contaminate one another are associated dependently, depending on all other genes
are distributed to separate gametes
The principle of _____ suggests that a plant with the genotype Tt will display a tall phenotype. segregation incomplete dominance codominant dominance
dominance
Gregor Mendel is considered the Father of _____. Heredity Genetics DNA Inheritance
genetics
A P1 cross between a yellow seeded female (YY) and a green seeded male (yy) result in offspring that are _____. genotypically and phenotypically identical genotypically and phenotypically different genotypically identical but phenotypically different genotypically different but phenotypically identical
genotypically and phenotypically identical
Genes that carry contrasting inheritance factors are called _____. alleles homozygotes heterozygotes
heterozygotes
A TT genotype is said to be _____. dihybrid homozygous heterozygous
homozygous
When neither gene in a genotype pair is dominant and neither gene is recessive, the genes are said to be _____. incomplete alleles multiple alleles incomplete dominant alleles
incomplete dominant alleles
A family has seven sons. The chance that their eighth child will be a daughter is _____. one chance in eight practically none one chance in seven one chance in two
one chance in two
The outward appearance of a particular trait is called the____________
phenotype
