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sangriahamster281Lv1

28 Sep 2019

thelinkage phase (cis or trans) of alleles in a heterozygous parent isdetectable as...?

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28 Sep 2019

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When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 out of 4 the dominant phenotype and 1 out of 4 the recessive phenotype

b. have 2 out of 4 the dominant phenotype and 2 out of 4 the recessive phenotype

c. all have the dominant phenotype

d. have 1 out of 4 the dominant phenotype

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous dominant for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. all have the recessive phenotype

b. all will have the dominant allele

c. all be homozygous dominant genotype

When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

b. have 1 dominant phenotype, 2 heterozygous genotypes, and 1 homozygous recessive phenotype

c. have all dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

When doing Punnett squares for fur, the letter f represents ______ and the letter F represents _____.

Select one:

a. the recessive allele, the dominant allele

b. the dominant allele, the recessive allele

c. the dominant gene, the recessive gene

d. the recessive gene, the dominant gene

10.

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous recessive for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. be half heterozygous and half homozygous recessive

b. be all heterozygous

c. be all homozygous recessive

d. be all homozygous dominant

Pea plant #1, smooth and yellow, is mated to other peas, all winkled and green. The usual loci and alleles. No interactions and 100% penetrance. The progeny of that mating:
39 smooth & yellow, 36 wrinkled & green, 7 smooth & green, 10 wrinkled & yellow.

1) what are the parental classes of progeny?
2) what is the recombination frequency for these data?
3) what was the linkage phase (cis or trans, coupling or repulsion) of the dominant alleles in pea #1?

viridianzebra706

4. The necessary components for gene expression are often described as either cis-acting elements (âacting from the same moleculeâ) or trans-acting factors (âacting from a different moleculeâ). Cis-acting elements are typically sequences that are required for expression. Trans-acting factors are typically proteins that recognize and bind cis-acting sequences to control or facilitate gene expression. For each of the trans-acting factors below, describe their enzymatic activity and one of their cis-acting target sequences. [8 pts; 4 pts each]

4a. RNA Polymerase

4b. Ribosome