Match the observations about meiosis and crosses below with thecorresponding principle developed by Mendel.A heterozygous individual[ Choose ]produces 50% of each gametetype.Alleles controlling different traits[ Choose ]can be transmitted to gametes innon-parental combinations.Each pair of homologous[ Choose ]chromosomes aligns andseparates independently inmetaphase and anaphase ofmeiosis I>

The Mendel's laws of inheritance include law of dominance, law of segregation and law of independent…

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erresponding principle developed by Mendel. heterozygous individual [ Choose ] roduces 50% of each gamete "pe. lleles controlling different traits [ Choose ] an be transmitted to gametes in on-parental combinations. ach pair of homologous [ Choose ] nromosomes aligns and eparates independently in etaphase and anaphase of >

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 30QP: Variations on a Theme by Mendel Pea plants usually have white or red flowers. A strange pea-plant...

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Variations on a Theme by Mendel Pea plants usually have white or red flowers. A strange pea-plant variant is found that has pink flowers. A selfcross of this plant yields the following phenotypes: 30 red flowers 62 pink flowers 33 white flowers What are the genotypes of the parents? What is the genotype of the progeny with red flowers?
A heterozygous individual has a _______ for a trait being studied. a. pair of identical alleles b. pair of nonidentical alleles c. haploid condition, in genetic terms
More Crosses with Pea Plants: The Principle of Independent Assortment Consider the following cross in pea plants, in which smooth pea shape is dominant to wrinkled, and yellow pea color is dominant to green. A plant with smooth yellow peas is crossed to a plant with wrinkled green peas. The offspring produced peas that were all smooth and yellow. What are the genotypes of the parents? What are the genotypes of the offspring?
Mendelian ratios are modified in crosses involving autotetraploids.Assume that one plant expresses the dominant trait greenseeds and is homozygous (WWWW). This plant is crossed to onewith white seeds that is also homozygous (wwww). If only onedominant allele is sufficient to produce green seeds, predict theF1 and F2 results of such a cross. Assume that synapsis betweenchromosome pairs is random during meiosis.
In radishes, color and shape are each controlled by asingle locus with two incompletely dominant alleles.Color may be red (RR), purple (Rr), or white (rr) andshape can be long (LL), oval (Ll), or round (ll). Whatphenotypic classes and proportions would you expectamong the offspring of a cross between two plantsheterozygous at both loci?
When Gregor Mendel was working in the mid 1800s, scientists had not yet discovered chromosomes or meiosis. However, we now understand how Mendel's principles are rooted in the events of meiosis. As an example of this, state Mendel's principle of independent assortment and explain how it relates to independent assortment in meiosis.
In mice, albinism (g) is recessive to grey coat colour (G). A grey mouse mated with an albino mouse. Over the course of several months, 38 pups were born. Out of 38 pups, 17 had a grey coat, and 21 were albino.Which of the following rows correctly identifies the parental and F1 generation genotypes?
Summer squash plants with the dominant allele C bear white fruit, whereas plants homozygous for the recessive allele c bear coloured fruit. When the fruit is coloured, the dominant allele G causes it to be yellow; in the absence of this allele (i.e., with genotype gg), the fruit colour is green. Assume that the C and G genes assort independently. Justify the claim that segregation of traits results in different combinations at the end of meiosis by providing a detailed description of the mechanisms involved. Blue, crimson, or violet petunias are available.
How can Mendel's postulates of segregation and independent assortment be explained by meiosis?
Explain the rationale behind a testcross. Is it necessary for one ofthe parents to be homozygous recessive for the genes of interest?In the heterozygous parent of a testcross, must all of the dominantalleles be linked on the same chromosome and all of the recessivealleles be linked on the homolog?
Consider the production of flower color in the Japanese morning glory (Pharbitis nil). Dominant allelesof either of two separate genes (A_bb or aaB_) produce purple petals, A_B_ produces blue petals, andhomozygous recessives for both genes produce scarlet petals. Deduce the genotypes of parents andprogeny in the following crosses: (Tabulate your answers).PARENTS PROGENYa) blue x scarlet 1/4 blue: 1/2 purple : 1/4 scarletb) purple x scarlet 1/2 purple : 1/2 scarlet
In guinea pigs, the allele for black fur (B) is dominant over the allele for brown (b) fur. A black guinea pig is crossed with a brown guinea pig, producing five F1 black guinea pigs and six F1 brown guinea pigs. Q. How many copies of the black allele (B) will be present in each cell of an F1 black guinea pig at the following stages: G1, G2, metaphase of mitosis, metaphase I of meiosis, metaphase II of meiosis, and after the second cytokinesis following meiosis? Assume that no crossing over takes place.