Medels Laws Of Inheritance 2.3 Flashcards
A rabbit with short brown fur is crossed with a rabbit with long black fur. The offspring are crossed, and the F2 generation contains 17 rabbits with long black fur, two rabbits with short brown fur, six with short black fur, and seven with long brown fur.
Which of the following phenotypes are dominant?
Dominance cannot be determined.
Short and brown are dominant.
Long and black are dominant.
Long and brown are dominant.
Long and black are dominant.
A gene for eye color in humans has three alleles: E, EB, and E, for brown, blue, and green eyes, respectively. If an individual is EB/ES, are they homozygous or heterozygous for eye color?
A Homozygous
B Heterozygous
C Neither, because the genotype is incomplete without an allele for brown eye color.
D Neither, because with more than two possible alleles for a gene, heterozygous and homozygous do not mean anything.
Heterozygous
In the following dihybrid cross in pea plants, the Fallele codes for full pods and the P allele codes for purple flowers. Which of the following is phenotype of the bolded box, and what is the predicted frequency of this phenotype?
FP
Fp.
fP
Tie
[FP FF/PP FF/Pp Ff/PP Ff/Pp
Ep FF/Pp FF/pp_ Ff/Pp Ff/pp fP Ff/pp Ff/Pp ff/PP ff/Pp foFf/Pp Ff/pp ff/Pp ff/pp
A Full pods/purple flowers; 3/16
B Full pods/white flowers; 3/16
C Constricted pods/purple flowers; 9/16
D Constricted pods/white flowers; 9/16
B Full pods/white flowers; 3/16
A diploid organism has 46 chromosomes. Which of the following are the number of chromosomes that are in each gamete of that organism?
46
92
23
18
23
Andrea is blood type A and Manu is type B. Their child Eric is type A. What is Manu’s genotype?
I b /i
A red-eyed fruit fly and a white-eyed fly mate and have 78 offspring. The Fis are crossed. The F2 generation is comprised of 2,098 flies with red eyes and 735 flies with white eyes.
Which of the following is dominant?
A Red eyes are dominant.
B White eyes are dominant.
C Because both eye colors appear in the F2 generation, neither is dominant.
D Dominance cannot be determined.
A Red eyes are dominant.
The gene U codes for skin color. A heterozygote has green skin, and a recessive homozygote has blue skin. When a Uu is crossed with a u, which of the following are the possible genotypes in the offspring, and what is the frequency of blue skin and green skin offspring?
A Uu and u, 50% are green skin and 50% are blue skin
B Uu and u, 75% are green skin and 25% are blue skin
C UU, Uu, and uu, 75% are green skin and 25% are blue skin
D UU, Uu, and uu, 25% are green skin, 25% are blue skin, 50% are blue-green skin
A Uuand u, 50% are green skin and 50% are blue skin
In squirrels, short fur (S) is dominant over long fur (s), and gray coat color (G) is dominant over brown (g). A pure-breeding squirrel with short gray fur is crossed with a pure-breeding squirrel with a long brown coat. The offspring are crossed, and the following Punnett square is generated.
SG
5g.
1
SG SS/GG SS/Gg S$/GG
Sg SS/Gg SS/gg Ss/Gg Ss/gg
Ss/GG Ss/Gg ss/GG ss/Gg
4 Ss/Gg Ss/gg ss/Gg
Which of the following fills in the six boxes with the correct genotypes?
1 = SG
2 = sg
3 = SG
4 = sg
5 = Ss/Gg
6 = ss/gg
Most mammals are __________
meaning their chromosome set number is
chromosome set number is. _________
Gametes of these mammals are _________
Cells, meaning their chromosomes set number is ________
Which of the following options correctly completes the statements above?
A diploid, n; haploid, 2n
B haploid, 2m, diploid, n
C haploid, n; diploid, 2n
D diploid, 2n; haploid, n
D
diploid, 2r, haploid, n
A plant with purple flowers crosses with another plant of the same species that has white flowers. Flower color in this plant is the result of a single gene All of the offspring have pale lavender flowers. This is an example of which of the following?
Codominance
Incomplete dominance
Independent assortment
Epistasis
Incomplete dominance
same
1. A pea plant has a dominant homozygous genotype.
Which of the following letters best represent this
genotype?
A WW
B. Ww
C. ww
D. WX
WW
- Which of the following best describes the expression of alleles?
A. Heritable trait
B. Genotype
C. Phenotype
D. P generation
Phenotype
- Which of the following best describes non-Mendelian inheritance patterns?
They occur when there are factors other than dominant and recessive traits.
B. Each trait has one dominant and one recessive allele.
C. Heterozygous monohybrid crosses result in a 3:1 ratio of dominant-to-recessive phenotypes.
D. Traits are only inherited on the somatic chromosomes.
They occur when there are factors other than dominant and recessive
