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amid [387]
3 years ago
12

Ggtt pea plants can produce _____ type(s) of gametes, but a ggtt plant can produce _____ type(s) of gametes. (concept 14.2

Biology
1 answer:
LUCKY_DIMON [66]3 years ago
7 0
From the knowledge on genetics; GgTt pea plants can produce four types of gametes, but a ggtt can produce one type of gamete. A GgTt is heterozygous therefore they carry different versions of a gene, while ggtt is homozygous thus carrying the same version of a gene. Therefore, GgTt can produce GT, gT, Gt, gt, (four gametes) while ggtt can only make a gt ( 0ne gamete).
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The dominant allele H reduces the number of body bristles in fruit flies, giving rise to a hairless phenotype. In the homozygous
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- SSHh: No viable-Lethal

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A cross between two normal flies carrying the two alleles (SsHh) will produce (according to the attached Punnett Square):

6 Normal (SsHh, ssHh, and sshh)

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Therefore, the ratio of flies with normal bristles to hairless individuals will be 3:1.

b. When the hairless progeny of the previous cross (Sshh) are crossed with one of the parental normal flies from part a (SsHh), it will be produced (according to the second Punnett Square):

8 Normal (SsHh, ssHh, and sshh)

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Read 2 more answers
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