In corn the genes for tassel length (alleles T and t) and rust resistance (alleles R and r) are known to be on separate chromosomes. In the course of a routine mating check experiment, a breeder got the following results upon crossing T/t:R/r with a double recessive strain (t/t;r/r): genotype Number of progeny T/t; R/r 98 t/t; r/r 104 T/t; r/r 3 t/t; R/r 5 In addition to these data she noted that the cobs contain only about 50% of the expected kernels. Note that in corn, each kernel is the result of one mating or can be considered one progeny. Hence 50% of the matings are not producing viable offspring. Draw a diagram showing the arrangement of the alleles on the parental chromosomes. Based on your hypothesis from part b, reassign genotypes to the progeny classes. Enter your new genotypes into the table above as an additional column. If the karyotype was done on the progeny what unusual feature would be observed?

please make sure to read the question (THERE ARE OTHER VARIATIONS OF THE QUESTION ON DIFFERNT WEBSITES THAT ARE DIFFERENT THAN MINE)

A homozygous fly with two recessive mutations causing purple body and short wings (ppss) is mated with a fly heterozygous for both mutations (p+p and s+s): "+" represents the wild-type allele. They have the following offspring:   26   Wild type (normal body, normal wings) 345   Purple body, normal wings 376   Normal body, short wings   13   Purple body, short wings What is the allele arrangement (haplotype) for the heterozygous parental fly? ("p" designates the mutant allele; "p+" designates the wild-type allele.)

A family tree of sorts is called a pedigree. The symbols used for a pedigree are: female, unaffected female, affected ☐male, unaffected male, affected I 11 III 1 Pedigree Chart Minor Peta #2 Siblings are placed in hirth order from left to right and are labeled with Arabic numerals. Each generation is labeled with a Roman numeral. Therefore, the male exhibiting the trait in the pedigree below in the bottom, center would be identified as III-4. 1. Which members of the family above are affected by Huntington's Disease? 4. How many girls did II-1 and 11-2 have? 3. How many children did individuals 1-1 and 1-2 have? 2. There are no carriers for Huntington's Disease- you either have it or you don't. With this in mind, is Huntington's disease caused by a dominant or recessive trait? 5. How are individuals III-2 and II-4 related? 8 -Huntington's Disease

label the animal cell organelles

In lab mice, reddish-brown coat phenotype is termed “red”. The gene for coat color is X-linked. The allele for white coat (Xw) is recessive to the allele for red coat (X+). The table below shows the results of a few crosses of mice parents. What are the genotypes of the parents? Results: 98 red male, 111 male offspring 204 red female offspring When Male and Female Parents are red

What cross will result in half homozygous dominant offspring and half heterozygous offspring? What cross will result in all heterozygous offspring?

A farmer is interested in a new colour pattern in his breed of cattle. This trait is controlled by a single autosomal gene (Gene R) with two alleles. The R-allele results in a spotted colour pattern, while the recessive allele causes a solid colour. The farmer has a cow that has the spotted pattern. Can you suggest how the farmer can determine the genotype (RR or Rr) of his cow in a single cross? Describe this cross and provide details on how you would interpret the results.

Three linked loci are evaluated to determine the recombination frequency of the loci. To set up the test cross, an individual that is true breeding dominant for all three phenotypes is crossed with an individual that is true breeding recessive for all three phenotypes. F1 offspring are crossed with individuals that are recessive for all phenotypes. The phenotypic results are shown in the table below.   Phenotype Number of Offspring Dominant 1, Dominant 2, Dominant 3 322 Dominant 1, Dominant 2, Recessive 3 82 Recessive 1, Dominant 2, Recessive 3 5 Dominant 1, Recessive 2, Dominant 3 2 Recessive 1, Dominant 2, Dominant 3 28 Recessive 1, Recessive 2, Dominant 3 89 Recessive 1, Recessive 2, Recessive 3 312 Dominant 1, Recessive 2, Recessive 3 25   1. Which two phenotypes are parental? 2. What is the map distance between locus 1 and locus 2? 3. What is the map distance between locus 1 and locus 3? 4. What is the map distance between…