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allsm [11]
2 years ago
6

The map above shows B blood group frequencies across eastern Asia and far western Europe. There is a gradual change in the chara

cteristic from one population to the next. This pattern is called a:__________.
Biology
1 answer:
qaws [65]2 years ago
6 0

Answer:

cline

Explanation:

  • When a measurable gradient is seen in a particular character across population living in a geographical range then this gradient is termed as cline.
  • The clines can either be abrupt or continuous across a given geographical range.
  • Clines arise due to two factors - gene flow as well as selection.
  • In a map the clines are represented by lines that indicate the changes in character from one end to another across a geographic range.
  • Therefore, the B blood group frequency changes in a map across eastern Asia and far western Europe form a pattern which is termed as a cline.
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Answer:

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Explanation:

This question involves a single gene coding for flower colour in snapdragon plants. The alleles of the gene exhibits incomplete dominance i.e. the red allele (R) ia not completely dominant over the white allele (W), hence an intermediate pink phenotype (RW) is formed. Based on this, a red snapdragon will have genotype, CRCR while a white one will have genotype, CWCW. The intermediate pink phenotype will have a genotype, CRCW.

The image attached to this question shows four crosses between different traits.

In the second cross between a pink (CRCW) and white offspring (CWCW), 2pink and 2white offsprings will be possibly produced in the ratio 1:1.

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In the fourth cross between a pink (CRCW) and pink (CRCW) snapdragon, red, pink and white offsprings will be produced in the ratio 1:2:1.

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