Genetics Questions
Explore questions in the Genetics category that you can ask Spark.E!
What animal does X inactivation occur in?
E. Determine what the distance is between the gene for eye color and the gene for body color. 19.4 map units31.1 map units31.9 map units37 map units
When does DNA replication take place in the cell cycle?
Determine what proportion of the female's gametes are (h E).17.6% 19.4%31.1%31.9%
Q4 on LG 16: B. Next, draw the arrangement of the genes for eye and body color on the female's maternal and paternal chromosomes. Since she is heterozygous there are two possible arrangements of the linked genes on her chromosomes. Based on the offspring counts above, how can you use this information to determine the correct arrangement of the linked genes? Draw out the female's maternal and paternal chromosomes, as well as the possible gametes produced.
4. In humans, males have sex linked disorders: A. more frequently than females.B. less frequently than femalesC. There is no difference in frequency of sex-linked disorders in males and females.
The genes C and D are completely linked. If an individual who is CCdd mates with an individual who is ccDD, then their offspring mates to an individual who is ccdd, how many genotypes will be seen in the third generation (assume that both genes show complete dominance)?A. One.B. Two.C. Four.D. Eight.
In a cross of AaBb x AaBb, what fraction of the offspring can be expected to express one of the two dominant alleles, but not both?A. 1/2B. 3/16C. 9/16D. 3/8
When genes are located on X or Y chromosomes what are they called?
When genes are closer together, do they have higher or lower frequencies of crossing over?
When do homologous chromosomes. pair together and cross over?
4. You are studying two different genes and each gene has two alleles. Each allele is either completely dominant or recessive. You cross one parent that is homozygous recessive with a parent that is heterozygous for both genes, and observe four phenotypic classes in a ratio of 1:1:1:1. You conclude that:A. The genes may or may not be on the same chromosome.B. The genes can only be on different chromosomes.C. The genes can only be on the same chromosome.D. You can't tell if these genes are linked because crossing-over might have occurred between sister-chromatids during anaphase II.
What animals has the same sex determination as humans?
What is the monomer of proteins (aka polypeptide)?
2. A white-eyed female Drosophila is mated with a red-eyed (wild-type) male. What result do you predict for the numerous offspring? Draw a Punnett square to help you answer this question.
Is cystic fibrosis dominant or recessive?
Red-green color blindness is X-linked in humans. If a male is red-green color blind, and both parents have normal color vision, which of the male's grandparents is most likely to be red-green color blind? Draw out the family pedigree below to help answer this question. A. Maternal grandmotherB. Maternal grandfatherC. Paternal grandmotherD. Paternal grandfatherE. Either grandfather is equally likely
A rooster with gray feathers and a hen of the same phenotype produce 15 gray, 6 black, and 8 white chicks. What is the simplest explanation for the inheritance of these colors in chickens? What phenotypes would you expect in the offspring of a cross between a gray rooster and black hen?
7. A couple are both phenotypically healthy, but their son suffers from Duchenne muscular dystrophy. If the couple has a second child, what is the probability that he or she will also have the disease? What is the probability if the second child is a boy? A girl?
Does RNA or DNA have an open base?