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Vesnalui [34]
3 years ago
10

In humans, females inherit an X chromosome from each parent; males inherit their X chromosome from their mother and their Y chro

mosome from their father. The same is true of all other placental mammals: males produce X and Y gametes, and females produce only X gametes. In this system, referred to as the XX-XY system, maleness is determined by sperm cells that carry the Y chromosome. Yet the XX-XY sex determination system does not occur in all animal species. It is only one of a variety of systems within the animal kingdom. Above are Punnett squares illustrating three examples of gender inheritance patterns: humans, insects and birds. Consider both the illustration and the text. Compare the inheritance system of bird with that of humans.
Biology
2 answers:
Vlad [161]3 years ago
5 0

In bird, females are heterogametic, produce two type of gametes. The two different sex chromosomes of a female bird has been designated to be the Z and W chromosomes. Whereas males have a pair of Z- sex chromosomes. Males are homogametic produce only one type of gametes with Z-sex chromosomes. Thus sex determination is ZW-ZZ type. In humans sex determination is XX-XY type. Males are heterogametic produce X and Y gametes and females are homogametic produce one type of gametes. Therefore, in bird sex are determined by female gametes.  

Firlakuza [10]3 years ago
3 0

Answer: The answer in B for anyone on USATestprep

Explanation:

I just answered the question

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