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Consider a pair of homologous chromosomes heterozygous for three genes (e.g., ABC/abc) during prophase I of meiosis. Let the sister chromatids of one homolog be numbered 1 and 2 (ABC).
But the same thing did not work for problem #1. Adding 100 to the recombinant numbers resulted in an answer of 1.2, which is not correct. Nor is the correct answer 1.1, which would make up the dista
You have created 3 independent mouse strains carrying the same transgene by non-targeted transgenesis. All 3 strains have otherwise identical genetic backgrounds.
Mr. Green is heterozygous for one autosomal gene pair, "Bb", and he carries a recessive x-linked gene "d". What proportion of his sperms will be "bd".
A transformation experiment is performed with a donor strain that is resistant to four drugs: A, B, C, D. The recipient is sensitive to all four drugs.
In haploid yeast, a cross between arg- ad- nic+ leu+ and arg+ ad+ nic- leu- produces haploid sexual spores, and 20 of these are isolated at random. The resulting cultures are tested on various media
In garden peas, yellow seed color is dominant over green, and round seed shape dominant over wrinkled. What phenotypic ratio can be expected in F2 from a cross between pure yellow and round with gre
How many different types of mating are possible.
Fur colour in the babbit, a furry little animal and popular pet, is determined by a pair of alleles, B and b. B/B and B/b babbits are black, and b/b babbits are white.
Gaucher disease is caused by a chronic enzyme deficiency that is more common among Ashkenazi Jews than in the general population. A Jewish man has a sister afflicted with the disease.
A true-breeding red snapdragon was crossed to a true-breeding white snapdragon. The F1 progeny were pink. When F1 x F1 matings were made, the following F2 progeny were observed.
In rabbits, one enzyme (the product of a functional gene A) is needed to produce a substance required for hearing. Another enzyme (the product of a functional gene B) is needed to produce another su
There are three differences between the accomplishments of mitosis and the accomplishments of meiosis. One of these differences is fairly trivial: the other two are very important.
Assuming that your hypothesis about the nature of the black and yellow color is correct, if the two black dogs with the yellow puppy have a lot of liters of puppies, what percentage of those puppies
Hairless condition in Mexican hairless breed of dogs is heterozygous [Hh] against the normal homozygous recessive [hh]. Puppies homozygous for H allele are born dead due to abnormalities in mouth an
Chickens with splashed white feathers when crossed with black feathered birds produce blue andalusian [slate blue] feathered birds. Cross between two blue andalusians produce offsprings of splashed
A series of crosses in a controlled environment in which all progeny were known to carry a dominant autosomal gene A that causes eye abnormality produced 600 normal flies and 1400 abnormal flies.
Pelger anomaly in rabbits involves white blood cell nuclear segmentation. Rabbits homozygous [PP] to this condition are usually still born or die just after birth due to gross illformed skeletal st
In a particular flower, a single pair of alleles determines the petal color (C). Red flowers have the genotype CR/CR (homozygous for CR), white flowers have the genotype Cr/Cr (homozygous for Cr) an
Cells of an E. coli strain that are trp- lac Z-met+bio+were mixed with cells of an E. coli strain that are trp+lac Z+ met- bio-and cultured for several hours. Then cells were removed, washed, and tr
If the mother of a child is blood type O+ and the child is A-, what blood type would the father be? Does the Rh factor of the child being - (negative) mean that one of the parents has to be negative
A mother wants to know the blood type of her son's father. What blood type would the father be if her son and herself are both type A+. Also, her (the mother's) brother is type 0 and her mom is A+.
A human geneticist determined the pedigree shown in the diagram (attachment) with filled symbols showing the affected individuals. How is this pattern of inheritance described.
The VNTR alleles analyzed in forensic DNA fingerprinting experiments are highly variable from individual to individual. How do the many VNTR alleles at a single locus differ from each other.
Two people, each homozygous ro autosomal recessive deafness-producing alleles have four children. Three are deaf. One can hear. Possible explanations for the appearance of the hearing child include