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nirvana33 [79]
3 years ago
9

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms?A) male gametophyteB) fe

male gametophyteC) male sporophyteD) female sporophyte
Biology
1 answer:
Alexxandr [17]3 years ago
4 0

The correct answer is A. male gametophyte

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Answer:

1 black : 1 orange

Explanation:

This is a typical monohybrid cross involving a single gene coding for eye color in MendAlien. The allele for black eyes (B) is dominant over the allele for orange eyes (b). In an heterozygous state, Bb i.e. combination of both dominant (B) and recessive (b) alleles, the MendAlien will be phenotypically black.

In a cross between a heterozygous MendAlien (Bb) and an orange-eyed MendAlien (bb), two of the offsprings will have a Bb genotype and be phenotypically black-eyed which the other two will have a bb genotype and be phenotypically orange-eyed. Thus, a phenotypic ratio of 2 Bb : 2 bb will be obtained.

This is also equal to 1:1 i.e. 1 black-eyed : 1 orange-eyed.

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