How does the heterogametic sex differ from the homogametic sex? a. The heterogametic sex is male; the homogametic sex is female.b. Gametes of the heterogametic sex have different sex chromosomes; gametes of the homogametic sex all have the same sex chromosome.c. Gametes of the heterogametic sex all contain a Y chromosome; gametes of the homogametic sex all contain an X chromosome.

How does the heterogametic sex differ from the homogametic sex? a. The heterogametic sex is male; the homogametic sex is female.b. Gametes of the heterogametic sex have different sex chromosomes; gametes of the homogametic sex all have the same sex chromosome.c. Gametes of the heterogametic sex all contain a Y chromosome; gametes of the homogametic sex all contain an X chromosome.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter14: Human Inheritance

Section: Chapter Questions

Problem 2GP: Human females have two X chromosomes XX; males have one X and one Y chromosome XY. a. With respect...

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Sex-reversed females with XY were found to be missing SRY gene on their Y chromosomes, while sex-reversed males with XX were found to carry a portion of a Y chromosome that has the SRY gene. What can you conclude from these two cases? 1.Sex determination depends primarily on the combination of sex chromosomes and the presence of SRY gene. 2.X and Y chromosomes can’t pair up during meiosis because they are not true homologous chromosomes. 3.Nonreciprocal crossover could result in translocation of the SRY gene between X and Y chromosome. 4. The SRY gene has a key role to determine maleness. 5.The Y chromosome contains a gene that determine maleness.
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X chromosome alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X chromosome allele, how many types of gametes can she produce with respect to that allele?
Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?
Human females have two X chromosomes XX; males have one X and one Y chromosome XY. a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. A female homozygous for an X-linked allele can produce how many types of gametes with respect to that allele? c. A female heterozygous for an X-linked allele can produce how many types of gametes with respect to that allele?
One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in the image: 1. The adult butterfly is: a. Viviparous b. Ovoviviparous c. Oviparous d. None of these 2. Gender in the butterfly’s offspring will be determined by: a. Sex chromosomes, in which XX is female XY is male b. A single sex chromosome, in which XX is female and XO is male c. Haplodiploidy, in which an unfertilized egg develops into a female through ameiotic parthenogenesis. d. Hermaproditism e. c and d f. None of these 3. In the development of the butterfly, it has: a. A vermiform larva and a coarctate pupa that develops inside a puparium b. A eucephalus larva and an exarate pupa that develops inside an ootheca c. An eruciform larva and an obtect pupa that develops inside a chrysalis d. A scarabeiform larva and a eucephalus pupa that develops inside a cocoon of silk.
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