sahilnub13

The presence or absence of a widow's peak (pointed hairline) is controlled by a single gene in humans. Widow's peak is dominant to a straight hairline.

If two individuals that both have widow's peaks have ten children that all have widow's peaks, what would be the logical genotype of the parents?

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. About 70% of Americans get a bitter taste from the substancecalled phenylthiocarbamide (PTC). It is tasteless to the rest. The"taster" allele is dominant to non-taster. Also, normal skinpigmentation is dominant to albino. A normally pigmented woman whois taste-blind for PTC has an albino-taster father. She marries analbino man who is a taster, though the man's mother is anon-taster.

A. Whatare the genotypes of the woman and man?

- B. What phenotypesand in what proportion would you expect in their children?

1) A farmer mates normal pigs, and 38 offspring are born. Ofthese, 29 are normal, and 9 have swollen forelegs and die soonafter birth. Explain the genetic basis for this.

2)Ability to taste PTC (Phenyl thiocarbamide), a bitter chemicalfound in some vegetables, depends on carrying at least one dominantallele, T, for the taster trait. Non-tasters are homozygous for theressive allele (t). Another trait, albinism, is inherited as asimple recessive in which normal pigmentation is dominant. AnAlbino man who is a tester and has a mother who is a non tastermarries a normally-pigmented woman who is a notaster and whosefather is an albino taster.

(a) What are the henotypes pf the man and his wife?

(b) What type of children might this couple expect?

show the crossing*

3) (a) A normal woman whose father was color blind marries a manwith normal vision. What proportion of their sons is expected to becolor blind? if her husband had been color blind, what wold havebeen expected for the sons?

9b) A man with free earlobes whose mother was color blind andwhose father had attached earlobes marries a woman whose colorblind mother had attached earlobes and whose normal visioned fatherhad attached earlobes.

What is the genotype pf the man?_________________ of his whife?__________________

If they have a famility, what is the change of them having:

(1) a child with normal vision and free earlobes

(2)a color blind son with attached earlobes?

explain the importance of the democratic process, and identify the challenges to our democracy today.

At the start of his race, 86-kg Olympic 100-m champion Usain Bolt from Jamaica pushes against the starting block, exerting an average force of 1700 N. The force that the block exerts on his foot points 20∘   above the horizontal. Determine his horizontal speed after the force is exerted for 0.32 s. Indicate any assumptions you made.